Synthesis of magnetic metal organic framework/covalent organic framework hybrid materials as adsorbents for magnetic solid phase extraction of four endocrine disrupting chemicals from milk samples.
CONCLUSIONS: Fe3 O4 @A-TpBD@NH2 -MIL-125(Ti) possess good adsorption capability and selectivity for EDCs. In addition, the proposed MSPE-HPLC/MS/MS method based on Fe3 O4 @A-TpBD@NH2 -MIL-125(Ti) is effective and sensitive for the determination of EDCs in real samples, and can be used as a robust alternative method for monitoring EDCs in complex matrixes. PMID: 32726878 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 29, 2020 Category: Chemistry Authors: Yue B, Liu J, Li G, Wu Y Tags: Rapid Commun Mass Spectrom Source Type: research

Metabolic Profiling of Synthetic Cannabinoid 5F-ADB and Identification of Metabolites in Authentic Human Blood Samples via Human Liver Microsome Incubation and Ultra-High Performance Liquid Chromatography/High-Resolution Mass Spectrometry.
CONCLUSIONS: 5F-ADB is rapidly metabolized in HLM. 5F-ADB, M1 and M5 are pharmacologically active at the cannabinoid receptors (CB1 /CB2 ) and M1 and M5 may contribute to a user's impairment profile. The results demonstrate that it is imperative that synthetic cannabinoid assays screen for pharmacologically active metabolites, especially for drugs with short half-lives. The authors propose that M1 and M5 are appropriate markers to include in laboratory blood tests screening for 5F-ADB. PMID: 32710798 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 25, 2020 Category: Chemistry Authors: Presley BC, Castaneto MS, Logan BK, Jansen-Varnum SA Tags: Rapid Commun Mass Spectrom Source Type: research

Rapid Glycosyl-Inositol-Phospho-Ceramides fingerprint from filamentous fungi pathogens using the MALDI Biotyper Sirius system.
CONCLUSIONS: We have demonstrated that routine MALDI-TOF in the linear negative ion mode combined with an apolar solvent system to solubilize the matrix is applicable to the detection of filamentous fungi GIPCs. PMID: 32700347 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 22, 2020 Category: Chemistry Authors: Saromi K, England P, Tang W, Kostrzewa M, Corran A, Woscholski R, Larrouy-Maumus G Tags: Rapid Commun Mass Spectrom Source Type: research

Laser ablation inductively coupled plasma mass spectrometry as a Novel Clinical Imaging Tool to Detect Asbestos Fibres in Malignant Mesothelioma.
CONCLUSION: Asbestos fibres detection in the lung tissues is very useful, if not necessary, to complete the pathological diagnosis of asbestos-related malignancies in medicolegal field. For the first time, this study demonstrates the successful application of LA-ICP-MS imaging to identify asbestos fibres and other mineral fibres within mesothelioma samples. Ultimately, high-resolution, fast-speed LA-ICP-MS analysis has the potential to be integrated into clinical workflow to aid earlier detection and stratification of mesothelioma patient samples. PMID: 32700418 [PubMed - as supplied by publisher] (Source: Rapid Commu...
Source: Rapid Communications in Mass Spectrometry : RCM - July 22, 2020 Category: Chemistry Authors: Voloaca OM, Greenhalgh CJ, Cole LM, Clench MR, Managh AJ, Haywood-Small SL Tags: Rapid Commun Mass Spectrom Source Type: research

Stable Nitrogen and Oxygen Isotope Fractionation During Precipitation of Nitrate Salt from Saturated Solutions.
CONCLUSIONS: While the N and O isotope composition of the Martian nitrate is remarkably similar to that of the present Atacama Desert, interpretation of the slope of the O vs N isotopes remains ambiguous due to the limited number of samples. Additional NO3 samples from Martian meteorites are needed to address the question of abiotic vs. biotic alteration of NO3 - on Mars. PMID: 32698248 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 22, 2020 Category: Chemistry Authors: Welsh H, Gueorguieva GA, Kounaves S, Amundson R Tags: Rapid Commun Mass Spectrom Source Type: research

Direct Analysis of Surface Chemicals using Vibrating Sharp-edge Spray Ionization Mass Spectrometry.
CONCLUSIONS: We have demonstrated a simple, effective, direct ambient-ionization method that is highly sensitive to molecules on a wide range of surfaces. The flexibility, small footprint, low cost, and voltage-free nature of this method make it an attractive tool for direct surface sample analysis using MS. PMID: 32692897 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 21, 2020 Category: Chemistry Authors: Ranganathan N, Lozier AM, Rawson MC, Johnson MB, Li P Tags: Rapid Commun Mass Spectrom Source Type: research

Effect of removal of organic material on stable isotope values in skeletal carbonate from taxonomic groups with complex mineralogies.
CONCLUSIONS: Based on these results and when using skeletal carbonate of complex mineralogies, we recommend considering the abandonment of pretreatment of biogenic carbonate for stable isotope analysis due to confounded results from previous studies, difficulties with preparation, and/or the absence of significant effects of organic material on isotope values. If pretreatment is necessary, avoid roasting especially at higher temperatures and durations, use minimal bleaching, and in general avoid using High-Mg calcite species in O and C stable isotope studies. If bleaching is used, clearly indicate the concentration and dur...
Source: Rapid Communications in Mass Spectrometry : RCM - July 17, 2020 Category: Chemistry Authors: Key MM, Smith AM, Phillips NJ, Forrester JS Tags: Rapid Commun Mass Spectrom Source Type: research

Determination of absolute photoionization cross-sections of some aromatic hydrocarbons.
CONCLUSIONS: Based on our measurements and literature data, PICSs of most aromatic molecules have very similar values beyond their ionization energies. However, molecules that contain phenylacetylene structure have PICSs higher than other aromatics. PMID: 32677075 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 16, 2020 Category: Chemistry Authors: Jin H, Yang J, Farooq A Tags: Rapid Commun Mass Spectrom Source Type: research

Effects of drying methods on plant lipid compounds and bulk isotopic compositions.
CONCLUSIONS: Based on our results, each drying technique yielded equivalent results for all plant wax and terpenoid concentrations and bulk leaf δ13 C values; however, oven drying modified the δ15 N values. PMID: 32677077 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 16, 2020 Category: Chemistry Authors: Suh YJ, Diefendorf AF Tags: Rapid Commun Mass Spectrom Source Type: research

Novel Methods for the Analysis of Toxicants in Bronchoalveolar Lavage Fluid Samples from E-cigarette, or Vaping, Product Use-Associated Lung Injury (EVALI) Cases: Selected Petroleum Distillates.
CONCLUSIONS: We developed and validated a method to quantify petroleum distillates in BAL fluid specimens using GC/MS. The assay provided precise and accurate analyses of EVALI and non-EVALI BAL fluid specimens in support of CDC's EVALI response. This method is applicable to the determination of a broad range of VOCs in BAL fluid specimens. PMID: 32672382 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 16, 2020 Category: Chemistry Authors: De Jesús VR, Chambers DM, Reese C, Braselton M, Espinosa P, Corstvet J, Blount BC Tags: Rapid Commun Mass Spectrom Source Type: research

Identification and structural characterization of lipid A from Escherichia coli, Pseudomonas putida and Pseudomonas taiwanensis by liquid chromatography coupled to high resolution-tandem mass spectrometry.
CONCLUSIONS: The hyphenation of HPLC and MS/MS enabled the selective and sensitive identification and structural characterization of various lipid A species from different gram-negative bacteria. These species varied in their substituted side chains, speaking of fatty acids and phosphate groups. Characteristic product ions facilitated the assignment of side chains to distinct positions of the lipid A backbone. PMID: 32673427 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 16, 2020 Category: Chemistry Authors: Froning M, Helmer PO, Hayen H Tags: Rapid Commun Mass Spectrom Source Type: research

Immunoaffinity Micro-Flow Liquid Chromatography/Tandem Mass Spectrometry for the Quantitation of PD1 and PD-L1 in Human Tumor Tissues.
CONCLUSIONS: A highly specific and sensitive immunoaffinity micro-flow LC/MS/MS method for the simultaneous quantification of PD1 and PD-L1 in tumor tissues was developed and implemented. This method combines the advantage of immuno-capture for analyte enrichment with the high specificity of detection of multiple surrogate peptides by LC/MS/MS. The quantification of PD1 and PD-L1 co-expression in tumor could help evaluate their role in assessing tumor type selection and patient stratification. PMID: 32666620 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 15, 2020 Category: Chemistry Authors: Zhu Y, Zalaznick J, Sleczka B, Parrish K, Yang Z, Olah T, Shipkova P Tags: Rapid Commun Mass Spectrom Source Type: research

An intriguing "reversible reaction" in the fragmentation of deprotonated dicamba and benzoic acid in a Q-orbitrap mass spectrometer: loss and addition of carbon dioxide.
CONCLUSIONS: Under collisional activation, the deprotonated dicamba and benzoic acids easily undergo carbon dioxide loss, but the decarboxylated product anions have an appropriate nucleophilicity to carbon dioxide and they can capture a background carbon dioxide molecule remaining in the vacuum system to regenerate the precursor ions. This study provides a new and deeper understanding of the gas-phase chemistry of deprotonated benzoic acid derivatives in mass spectrometry. PMID: 32666557 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 14, 2020 Category: Chemistry Authors: Chai Y, Chen H, Lu C Tags: Rapid Commun Mass Spectrom Source Type: research

Absolute isotope ratios defining isotope scales used in isotope ratio mass spectrometers and optical isotope instruments.
CONCLUSIONS: The use of different RStd values may lead to differences in the isotope delta values obtained if the normalization versus working standard gas is applied. For the range of Rstd used in the proprietary software, the potential differences are lowest for oxygen (
Source: Rapid Communications in Mass Spectrometry : RCM - July 14, 2020 Category: Chemistry Authors: Skrzypek G, Dunn PJH Tags: Rapid Commun Mass Spectrom Source Type: research

Haloxyfop Determination by Gas Chromatography-Tandem Mass Spectrometry in Eggs.
CONCLUSIONS: The determined limit of quantitation was 2.5 ng/g, and the method successfully identified haloxyfop residues in five of six batches of the chicken eggs, with nonzero values ranging from 2.7 to 14.5 ng/g. These values were consistent with flaxseed incorporation into the diet at 4 - 7% and known excretion into eggs at 2-3% of daily haloxyfop exposure, and establish the utility of the method in identifying regulatory noncompliance and adulteration of food sources. PMID: 32662916 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 14, 2020 Category: Chemistry Authors: Lehner AF, Zyskowski J, Fulton RM, Buchweitz JP Tags: Rapid Commun Mass Spectrom Source Type: research

Metabolic profiling of senkyunolide A and identification of the metabolite in hepatocytes by ultra-high performance liquid chromatography combined with diode array detector and high resolution mass spectrometry.
CONCLUSIONS: Hydroxylation, epoxidation, aromatization and GSH conjugation were the main metabolic pathways of senkyunolide A. This study provides an overview of the metabolic profiles of senkyunolide A, which is helpful for us to understand the action of this compound. PMID: 32663340 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 14, 2020 Category: Chemistry Authors: Zhang H, Liu C, Wang M, Sui Y Tags: Rapid Commun Mass Spectrom Source Type: research

Remembering Dai Games.
PMID: 32657448 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 13, 2020 Category: Chemistry Authors: Jones JJ Tags: Rapid Commun Mass Spectrom Source Type: research

Fatty acid sentinels as covalently bound randomization standards for triacylglycerol (TAG) quantitative analysis.
Abstract RATIONALE: Quantitative analysis of triacylglycerols (TAG) is impeded by a lack of standards and the huge number of potential TAG molecular species that may be present due to the combinatorial nature of glycerolipids. Randomization of acyl groups yields TAG mixtures with profiles predictable from fatty acid profiles; however, their use as calibration mixtures has been limited. METHODS: We introduce here the principle of fatty acid isotopic sentinels that are quantitatively added prior to randomization to enable verification that randomization is complete, and that can be used as internal standards. A...
Source: Rapid Communications in Mass Spectrometry : RCM - July 13, 2020 Category: Chemistry Authors: Wang DH, Wang Z, Martinez S, Tobias HJ, Brenna JT Tags: Rapid Commun Mass Spectrom Source Type: research

A method for stable carbon isotope measurement of underivatized individual amino acids by multi-dimensional high-performance liquid chromatography and elemental analyzer/isotope ratio mass spectrometry.
CONCLUSIONS: The consistency between the δ13 C values of reference and processed AAs demonstrates that the experimental procedure generates accurate δ13 C values unaffected by fractionation effects and contamination. This method is therefore suitable for δ13 C analysis of biological samples with higher precision than conventional approaches. We propose this new method as a tool to measure δ13 C values of AAs in biological, ecological and biogeochemical studies. PMID: 32656862 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 12, 2020 Category: Chemistry Authors: Sun Y, Ishikawa NF, Ogawa NO, Kawahata H, Takano Y, Ohkouchi N Tags: Rapid Commun Mass Spectrom Source Type: research

Sequential thermal dissolution of two low-rank coals and characterization of their structure by high-performance liquid chromatography/time-of-flight mass spectrometry and gas chromatography/mass spectrometry.
CONCLUSIONS: Non-destructive methods were used to obtain soluble matter from coals, and different chromatographic and mass spectrometric techniques were used to separate and analyze the organic matter in coals. Detailed molecular structure information was obtained for the efficient and clean utilization of low-rank coals. PMID: 32656863 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 12, 2020 Category: Chemistry Authors: Cao XH, Fan X, Xia JL, Mo WL, Nulahong A, Zhao YP, Zhao W, Ma FY, Wei XY Tags: Rapid Commun Mass Spectrom Source Type: research

Simultaneous Determination of Succinylcholine and Its Metabolite in Animal-derived Foods by Solid-phase Extraction Combined with Ultra Performance Liquid Chromatography-Mass Spectrometry.
CONCLUSIONS: This method can be used for the determination of succinylcholine as an illicit drug in animal-derived foods. It was successfully applied to identification and quantification of succinylcholine and succinylmonocholine in animal-derived foods collected from a local farmers market in Jilin province of China. PMID: 32656937 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 12, 2020 Category: Chemistry Authors: Liu S, Zhang B, Shi M, Wang H, Fu Y Tags: Rapid Commun Mass Spectrom Source Type: research

Dai Games Special Issue.
PMID: 32652670 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 11, 2020 Category: Chemistry Authors: Langley GJ Tags: Rapid Commun Mass Spectrom Source Type: research

Coceth Sulfate Characterization by Electrospray Ionization with Tandem Mass Spectrometry.
CONCLUSIONS: Direct injection MS/MS analysis of CES revealed a well-defined molecular weight distribution and allowed the alkyl chain composition and the number of ethylene oxide units to be to identified. PMID: 32648966 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 10, 2020 Category: Chemistry Authors: Onzo A, Acquavia MA, Cataldi TRI, Ligonzo M, Coviello D, Pascale R, Martelli G, Bondoni M, Scrano L, Bianco G Tags: Rapid Commun Mass Spectrom Source Type: research

Rapid screening of glycoalkaloids in Solanum scabrum and S. nigrum berries using ultra-high performance liquid chromatography with pathway-specified in-source fragmentation tandem mass spectrometry.
CONCLUSIONS: The peudo-MS3 method allowed for high-throughput targeted analysis with compact MRMs to address a large number of glycoalkaloids with diverse structures. This method could serve to meet the most heavy-duty demand for rapid inspection of SNBs glycoalkaloids. This method can be adopted and used by those involved in food safety and forensics, in developing food and industrial products and in genetics and breeding. PMID: 32644256 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 9, 2020 Category: Chemistry Authors: Lyu W, Yuan B, Dinssa FF, Simon JE, Wu Q Tags: Rapid Commun Mass Spectrom Source Type: research

Sequential extraction of the phosphate and collagen fractions of small bone samples for the analysis of multiple isotope systems ( δ18 OPO4 , δ13 C, δ15 N).
CONCLUSIONS: The new sequential extraction scheme combines the preparation for stable isotope analysis of bone mineral and organic phases, thus minimizing the sample amounts needed and damage caused on a sample piece. The method may allow analysis of skeletal samples previously excluded from isotope analysis due to material limitations. PMID: 32639042 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 8, 2020 Category: Chemistry Authors: Sahlstedt E, Arppe L Tags: Rapid Commun Mass Spectrom Source Type: research

Novel Methods for the Analysis of Toxicants in Bronchoalveolar Lavage Fluid Samples from E-cigarette, or Vaping, Product Use-Associated Lung Injury (EVALI) Cases: Terpenes.
CONCLUSIONS: We developed and validated a method to quantify selected terpenes in BAL fluid specimens using GC/MS/MS. The assay provided accurate and precise analyses of EVALI and non-EVALI BAL fluid specimens in support of CDC's EVALI response. This method is applicable to the determination of a broad range of terpenes in BAL fluid specimens. PMID: 32632930 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 7, 2020 Category: Chemistry Authors: De Jesús VR, Silva LK, Newman C, Blount BC Tags: Rapid Commun Mass Spectrom Source Type: research

High-precision stable isotope analysis of < 5 μg CaCO3 samples by continuous-flow mass spectrometry.
CONCLUSIONS: This study demonstrates that high-precision oxygen and carbon isotope analysis is possible on CaCO3 samples smaller than 5μg, by use of a continuous flow isotope technique. Of key importance are 1) the application of a cold trap that drastically reduces sample gas loss, and 2) a modified flushing regime that eliminates increasing background CO2 build-up in sample vials during longer automated sample runs. PMID: 32632996 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 7, 2020 Category: Chemistry Authors: Vonhof HB, de Graaf S, Spero HJ, Schiebel R, Verdegaal SJA, Metcalfe B, Haug GH Tags: Rapid Commun Mass Spectrom Source Type: research

Systematic characterization of alkaloids in Eomecon chionantha Hance using ultra-high-performance liquid chromatography-tandem quadruple-exactive orbitrap mass spectrometry with a four-step screening strategy.
CONCLUSIONS: This comprehensive study identified the alkaloids in ECH, thus providing a practical reference for further research. The UHPLC-Q-Exactive Orbitrap MS method, combined with a four-step screening strategy, which was developed and successfully applied to identify the alkaloids in ECH, may also be applicable for the efficient screening of other herbal medicines. PMID: 32634853 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 7, 2020 Category: Chemistry Authors: Lu M, Li K, He H, Cheng Y, Yang P Tags: Rapid Commun Mass Spectrom Source Type: research

In-situ synthesis of a novel MOAC affinity probe for the selective enrichment of low-abundance phosphopeptides.
CONCLUSIONS: This novel MOAC affinity probe (G@PDA@ZrO2 ), prepared by in-situ grafting metal oxides onto the surface of the carrier, showed good performance in enriching phosphopeptides. Thus, G@PDA@ZrO2 has good potential in phosphopeptidomics analysis. PMID: 32638431 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 7, 2020 Category: Chemistry Authors: Wang B, Wu H, Yan Y, Tang K, Ding CF Tags: Rapid Commun Mass Spectrom Source Type: research

Electrospray Ionization Rapid Screening sans LC Column: A Sensitive Method for Detection and Quantification of Chemicals in Animal Tissues and Urine.
CONCLUSIONS: RS-ESI-MS provided rapid, sensitive, and accurate analyses of nine veterinary drugs from complex matrices with very little sample preparation and produced quantitative data akin to LC/MS/MS. PMID: 32628302 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 6, 2020 Category: Chemistry Authors: Chakrabarty S, Shelver WL, Smith DJ Tags: Rapid Commun Mass Spectrom Source Type: research

Different glycolipids in sperm from different freshwater fishes - A high performance thin-layer chromatography/electrospray ionization-mass spectrometry study.
CONCLUSIONS: Phospholipids and glycolipids in crude lipid extracts can be analyzed in parallel by MS coupled to TLC. The direct application of tandem MS helps to elucidate the glycolipid structure. Thus, compositional analysis can be performed very rapidly. PMID: 32621632 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - July 4, 2020 Category: Chemistry Authors: Engel KM, Dzyuba V, Borys D, Schiller J Tags: Rapid Commun Mass Spectrom Source Type: research

Mass spectral studies of silyl derivatives of partially hydrolyzed products of nitrogen mustards: Important markers of nitrogen mustard exposure.
PMID: 32441060 [PubMed - in process] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 23, 2020 Category: Chemistry Authors: Chandra B, Roy KS, Shaik M, Waghmare C, Palit M Tags: Rapid Commun Mass Spectrom Source Type: research

Leaf Transition from Heterotrophy to Autotrophy is Recorded in the Intraleaf C, H and O Isotope Patterns of Leaf Organic Matter.
CONCLUSIONS: Efforts to establish quantitative isotope-environment relationships should take into account the fact that the evaporative leaf water 18 O and 2 H enrichment signal recorded in autotrophically laid-down α-cellulose is significantly diluted by the heterotrophically formed α-cellulose. The δ2 H of field-grown mature banana leaf n-alkanes is much more sensitive than α-cellulose as a recorder of the growth environment. Quantitative isotope-environment relationship based on greenhouse-grown n-alkanes δ2 H may not be reliable. PMID: 32441059 [PubMed - as supplied by publisher] (Sou...
Source: Rapid Communications in Mass Spectrometry : RCM - May 22, 2020 Category: Chemistry Authors: Zhu Z, Yin X, Song X, Wang B, Ma R, Zhao Y, Rani A, Wang Y, Yan Q, Su J, Gessler A, Zhou Y Tags: Rapid Commun Mass Spectrom Source Type: research

Matrix-assisted laser desorption/ionization time-of-flight/time-of-flight tandem mass spectrometry (negative ion mode) of French Oak Lignin: A Novel Series of Lignin and Tricin Derivatives attached to Carbohydrate and Shikimic acid Moieties.
CONCLUSION: The analysis of this complex mixture led to the identification of a series of lignin dimers, novel lignin-carbohydrate complexes (LCC), and unique tricin derivatives linked to different types of carbohydrates and shikimic acid moieties. This finding supports the presence of lignin-carbohydrate complexes in the isolated VRL. These analyses also showed that French Oak lignin is abundant in syringol moieties present in the lignin syringyl-units or tricin derivatives. Moreover, the identification of some lignin-carbohydrate and/or flavonoid-shikimic acid complexes could provide new insight into the relationship bet...
Source: Rapid Communications in Mass Spectrometry : RCM - May 22, 2020 Category: Chemistry Authors: Mikhael A, Jurcic K, Fridgen TD, Delmas M, Banoub J Tags: Rapid Commun Mass Spectrom Source Type: research

Comparisons of stable isotope composition among tissues of green turtles.
CONCLUSIONS: The patterns in slopes of regressions indicate that comparisons of measurements yielded by different tissues of wild animals are complicated by the fact that they are unlikely to be in isotopic equilibrium with their diet. Of the tissues used in this study, nail is simple to collect, requires minimal disturbance to the animal and no special preservation; these traits should make it attractive to turtle ecologists, but more information is needed on aspects such as growth rates. PMID: 32436593 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 21, 2020 Category: Chemistry Authors: Vanderklift MA, Pillans RD, Robson NA, Skrzypek G, Stubbs JL, Tucker AD Tags: Rapid Commun Mass Spectrom Source Type: research

Saccharomyces cerevisiae and pastorianus Species and Strain Differentiation by Direct Analysis in Real Time Time-of-Flight Mass Spectrometry (DART-TOFMS).
CONCLUSIONS: All strains could be distinguished by their negative-ion DART mass spectra with 97.7% validation accuracy. Clear differences were observed between dry and liquid forms and Saccharomyces strains with different applications to baking or beverage fermentation. Possible differences in metabolite profiles were suggested, but not confirmed, by accurate mass data. PMID: 32430915 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 19, 2020 Category: Chemistry Authors: Cody RB Tags: Rapid Commun Mass Spectrom Source Type: research

First investigation and absolute calibration of clumped isotopes in N2 O by mid-IR laser spectroscopy.
CONCLUSIONS: Our study represents a new methodological basis for the measurements of both singly substituted and clumped N2 O isotopes. It bears a high potential to stimulate future research in the N2 O community by establishing a new class of reservoir-insensitive tracers and molecular-scale insights. PMID: 32430945 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 19, 2020 Category: Chemistry Authors: Kantnerová K, Yu L, Zindel D, Zahniser MS, Nelson DD, Tuszon B, Nakagawa M, Toyoda S, Yoshida N, Emmenegger L, Bernasconi SM, Mohn J Tags: Rapid Commun Mass Spectrom Source Type: research

A simple cryogenic method for efficient measurement of triple oxygen isotopes in silicates.
CONCLUSION: A new cryogenic cleaning technique was developed that efficiently removes NF3 contaminants from oxygen gas produced by laser fluorination of silicates without using GC. The technique is simple, quick and cost-effective and provides highly precise and accurate ẟ17 O, ẟ18 O and ∆'17 O values. PMID: 32430975 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 19, 2020 Category: Chemistry Authors: Ghoshmaulik S, Bhattacharya SK, Roy P, Sarkar A Tags: Rapid Commun Mass Spectrom Source Type: research

Letter to the Editor.
PMID: 32431002 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 19, 2020 Category: Chemistry Authors: Sparkman OD Tags: Rapid Commun Mass Spectrom Source Type: research

Mass spectrometric analysis of 7-oxygenated androst-5-ene structures. Influence in trimethylsilyl derivatives formation.
CONCLUSIONS: The derivatization reagent, instrument conditions (inlet), as well as the chemical structures of the analytes present in the matrix can influence the results. So, before describing a new feature as a potential "new" metabolite, special caution must be taken since we could actually be dealing with an artifact. PMID: 32424893 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 18, 2020 Category: Chemistry Authors: Martinez-Brito D, de la Torre X, Parr MK, Botrè F Tags: Rapid Commun Mass Spectrom Source Type: research

A comparison of IRMS and CRDS techniques for isotope analysis of fluid inclusion water.
Abstract RATIONALE: On-line oxygen (δ18 O) and hydrogen (δ2 H) isotope analysis of fluid inclusion water entrapped in minerals is widely applied in paleo-fluid studies. In the state-of-the-art of fluid inclusion isotope research, however, there is a scarcity of reported inter-technique comparisons to account for possible analytical offsets. Along with improving analytical precisions and sample size limitations, interlaboratory comparisons can lead to a more robust application of fluid inclusion isotope records. METHODS: Mineral samples - including speleothem, travertine and vein material - were an...
Source: Rapid Communications in Mass Spectrometry : RCM - May 18, 2020 Category: Chemistry Authors: de Graaf S, Vonhof HB, Weissbach T, Wassenburg JA, Levy EJ, Kluge T, Haug GH Tags: Rapid Commun Mass Spectrom Source Type: research

Identification of short chain fatty acid esters of hydroxy fatty acids (SFAHFAs) in murine model by nontargeted analysis using ultra-high-performance liquid chromatography/linear trap quadrupole-Orbitrap mass spectrometry.
CONCLUSIONS: Identification of these novel SFHFAs can contribute to better understanding the chemical and biological properties of individual SFHFAs and their possible sources in the gut, which in turn helps us tackle the role of these lipids in various metabolic diseases. PMID: 32415683 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 15, 2020 Category: Chemistry Authors: Gowda SGB, Liang C, Gowda D, Hou F, Kawakami K, Fukiya S, Yokota A, Chiba H, Hui SP Tags: Rapid Commun Mass Spectrom Source Type: research

Rapid and direct identification of the origin of white tea with proton transfer reaction-time of flight-mass spectrometry.
CONCLUSIONS: Two classification models (PCA and OPLS-DA) were applied to the PTR-TOF-MS data obtained from the VOCs obtained from different white teas. The classification models were shown to be useful in identifying the origin of white tea samples, providing a reference for white tea identification. PMID: 32415693 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 15, 2020 Category: Chemistry Authors: Zhang D, Wu W, Qiu X, Li X, Zhao F, Ye N Tags: Rapid Commun Mass Spectrom Source Type: research

Proficiency testing of 78 international laboratories measuring tritium in environmental waters by decay counting and mass spectrometry for age dating and water resources assessment.
CONCLUSIONS: TRIC2018 helped identify recurrent weaknesses and potential solutions. Strategies for performance improvement of 3 H laboratories include: a) improved quantification of 3 H detection limits and analytical uncertainty, b) stricter quality control practices in routine operations along with care and recalibration of 3 H standards traceable to primary NIST standards, c) annual assessment of enrichment factors and instrumental performance, and d) for water age dating purposes the use of electrolytic enrichment systems having the highest possible 3 H enrichment factors (e.g.> 50x). PMID: 32415697 [PubMed - a...
Source: Rapid Communications in Mass Spectrometry : RCM - May 15, 2020 Category: Chemistry Authors: Copia L, Wassenaar LI, Terzer-Wassmuth S, Hillegonds DJ, Klaus PM, Araguás-Araguás LJ Tags: Rapid Commun Mass Spectrom Source Type: research

Mass Spectrometry of Synthetic Polymers.
PMID: 32415701 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 15, 2020 Category: Chemistry Authors: Charles L, Wesdemiotis C Tags: Rapid Commun Mass Spectrom Source Type: research

An Overview of Biological Applications and Fundamentals of New Inlet and Vacuum Ionization Technologies.
CONCLUSIONS: Examples are provided highlighting exceptional analytical capabilities associated with the novel ionization processes in MS that reduce operational complexity while increasing speed and robustness, achieving mass spectra with low-background for improved sensitivity suggesting the potential of this simple ionization technology to drive MS into areas currently underserved such as clinical and medical applications. PMID: 32402102 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 13, 2020 Category: Chemistry Authors: Trimpin S, Marshall DD, Karki S, Madarshahian S, Hoang K, Meher AK, Pophristic M, Richards AL, Lietz CB, Fischer JL, Elia EA, Wang B, Pagnotti VS, Lutomski CA, El-Baba TJ, Lu IC, Wager-Miller J, Mackie K, McEwen CN, Inutan ED Tags: Rapid Commun Mass Spectrom Source Type: research

An integrated strategy for profiling the chemical components of Scutellariae Radix and their exogenous substances in rats by ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry.
CONCLUSIONS: The metabolism of SR, as a whole, was systemically revealed for the first time, and our work also provided meaningful information for pharmacokinetics study and pharmacological analysis of SR in future work. PMID: 32396660 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 12, 2020 Category: Chemistry Authors: Zhang F, Li Z, Li M, Yu LY, Cui S, Chen J, Li R Tags: Rapid Commun Mass Spectrom Source Type: research

Generation of Sodium Halide Endohedral Metallofullerenes in the Gas Phase.
CONCLUSIONS: Ionic bond encapsulated EMF ions of NaX@C+ 2n (X= Cl, Br and I, 110≤2n≤244) were generated by laser ablation of the mixture of graphene and sodium halides, but no species containing lithium or potassium were observed. This work opens the possibilities of using laser ablation for the synthesis of large-sized salt encaged EMFs. Further study of the mechanism for these processes is important for the generation of the missing species. PMID: 32396673 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 12, 2020 Category: Chemistry Authors: Fan X, Wang Y, Kong X Tags: Rapid Commun Mass Spectrom Source Type: research

Proteomic analysis of 'Oriental Beauty' oolong tea leaves with different degrees of leafhopper infestation.
CONCLUSIONS: These results indicated that the unique aroma and taste of the leaves might be influenced by their protein expression profiles, as well as related factors such as defensive responses to tea green leafhopper saliva. PMID: 32396680 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 12, 2020 Category: Chemistry Authors: Chien HJ, Yang MM, Wang WC, Hong XG, Zheng YF, Toh JT, Wu CC, Lai CC Tags: Rapid Commun Mass Spectrom Source Type: research

Two-Color Symmetry Breaking in Laser-Based Secondary Neutral Mass Spectrometry.
CONCLUSIONS: An additional degree of freedom in a form of additional second color is introduced in laser-based secondary neutral mass spectrometry. The ion yield control is extended in a form of symmetry broken fields. PMID: 32396682 [PubMed - as supplied by publisher] (Source: Rapid Communications in Mass Spectrometry : RCM)
Source: Rapid Communications in Mass Spectrometry : RCM - May 12, 2020 Category: Chemistry Authors: Jerigova M, Lorenc D, Velic D Tags: Rapid Commun Mass Spectrom Source Type: research