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Quantification of peracetic acid (PAA) in the H 2 O 2 + acetic acid reaction by the wavelength shift analysis in near-UV/visible absorption region
Anal Sci. 2024 Jan 2. doi: 10.1007/s44211-023-00481-8. Online ahead of print.ABSTRACTIn our study, we present an innovative method for the analysis and real-time monitoring of peracetic acid (PAA) formation within the near-UV/Vis (visible) wavelength region. PAA's absorption spectrum, influenced by its presence in a complex quaternary equilibrium mixture with hydrogen peroxide (H2O2), acetic acid, and water, lacks discernible peaks. This inherent complexity challenges conventional analytical techniques like Beer's law, which rely on absorption intensity as a foundation. To address this challenge, we introduce a novel appro...
Source: Anal Sci - January 2, 2024 Category: Chemistry Authors: Guan-Yu Chen Yueh-Hsin Lin Cheng-Hsin Fu Cheng-Huang Lin Balaganesh Muthiah Wilfred V Espulgar Gil Nonato Santos Derrick Ethelbhert Yu Toshio Kasai Source Type: research

Fe-doped carbon dots: a novel fluorescent nanoprobe for cellular hypochlorous acid imaging
Anal Sci. 2023 Dec 27. doi: 10.1007/s44211-023-00484-5. Online ahead of print.ABSTRACTReal-time monitoring of hypochlorous acid (HClO) in biological systems is of great significance for exploring and regulating its pathological functions because abnormal production of HClO is closely related with many diseases, such as atherosclerosis, rheumatoid arthritis, and cancer. Herein, we developed a reliable fluorescent Fe-doped carbon dots (Fe-CDs) for the sensitive and selective detection of biological HClO using ferrocenecarboxylic acid and m-phenylenediamine as precursors through a one-step solvothermal procedure. The Fe-CDs e...
Source: Anal Sci - December 27, 2023 Category: Chemistry Authors: Yu Meng Yang Yuan Yan Jia Ying Zhou Cheng Zhi Huang Shu Jun Zhen Lei Zhan Source Type: research

Elemental analysis of hourly collected air filters with X-ray fluorescence under grazing incidence
Anal Sci. 2023 Dec 25. doi: 10.1007/s44211-023-00483-6. Online ahead of print.ABSTRACTThe X-ray fluorescence under grazing incidence condition (XRF-UGI) was applied for the direct analysis of aerosol filters. Particulate matter less than 2.5 microns (PM2.5) was collected hourly on polytetrafluoroethylene filters using a continuous PM monitor with a virtual impactor method. Although the sampling mass is in trace amounts of 5-30 μg, the metallic contents, such as V, Cr, Mn, Fe, Zn, and Pb, can be measured at sub-ng m-3 detection limits. The effects of the non-uniformity and poor flatness of the PM filters were discussed wit...
Source: Anal Sci - December 24, 2023 Category: Chemistry Authors: Hikari Takahara Atsushi Morikawa Saori Kitayama Tsugufumi Matsuyama Kouichi Tsuji Source Type: research

High-pH mobile phase in reversed-phase liquid chromatography-tandem mass spectrometry to improve the separation efficiency of aminoglycoside isomers
In this study, a highly basic mobile phase (pH > 11), which is not typically employed for reversed-phase liquid chromatography (RPLC), was utilized in RPLC-tandem mass spectrometry (MS/MS) to achieve effective separation between electrically neutral bases of aminoglycosides (AGs). A mixture of AGs was simultaneously analyzed using 500 mmol L-1 ammonia aqueous solution (pH 11.8) as the mobile phase. A total of 11 AGs, including 2 stereoisomers of neomycin (B and C) and 5 structurally similar components of gentamicin (C1, C1a, C2, C2a, and C2b), were completely separated for the first time. The high separation performance...
Source: Anal Sci - December 23, 2023 Category: Chemistry Authors: Yuta Nakano Hiroshi Sakamaki Yuiko Tasaki-Handa Shingo Saito Source Type: research

Simplified capture, extraction, and amplification of cellular DNA from water samples
In this study, a simplified pre-treatment method for analyzing DNA in water samples was evaluated. The process consists of filtration, DNA extraction, and amplification, which can be achieved within a short time. In the filtration process, two types of filters, firstly a tissue paper (Kimwipe) and then a glass filter (GF/F), were used in sequence. The first large pore size filter enabled a reduction in filtration time by removing large particulate matter impurities present in river water matrix. Cells spiked into 1 L of river water were recovered at more than 90% within approximately 5 min filtration time. Also, DNA was ex...
Source: Anal Sci - December 23, 2023 Category: Chemistry Authors: Mai Kawaguchi Hiroshi Aoki Hiroki Kamo Kazuki Miura Yuki Hiruta Siro Simizu Daniel Citterio Source Type: research

Confocal micro-X-ray fluorescence analysis for difference identification of ceramic samples
Anal Sci. 2023 Dec 22. doi: 10.1007/s44211-023-00464-9. Online ahead of print.ABSTRACTA nondestructive analytical method for difference identification is required in the research fields such as forensic science or archeology. An X-ray fluorescence (XRF) analysis is one of feasible techniques for this purpose. Micro-XRF using an X-ray micro-beam gives elemental distributions by scanning the samples. A confocal micro-XRF (CM-XRF) technique is a unique analytical technique to analyze limited volume. CM-XRF enables elemental depth imaging and elemental profiling in depth nondestructively. Therefore, CM-XRF has been applied for...
Source: Anal Sci - December 22, 2023 Category: Chemistry Authors: Kazuaki Mori Takayuki Hourai Tsugufumi Matsuyama Shangjun Zhuo Kouichi Tsuji Source Type: research

Ratio-fluorescent and naked-eye visualized dual-channel sensing strategy for Cu 2+ and alkaline phosphatase activity assay
Anal Sci. 2023 Dec 21. doi: 10.1007/s44211-023-00479-2. Online ahead of print.ABSTRACTThe levels of Cu2+ and alkaline phosphatase (ALP) are the important indicators of the developed stage of the relative diseases. Herein, a binary ratio-fluorescent and smartphone-assisted visual strategy basing on 4'-aminomethyl-4, 5', 8-trimethylpsoralen (AMT) and the oxidation of o-phenylenediamine was developed. Under the action of Cu2+, the fluorescent molecule, 3-diaminophenazine (DAP) formed which can act as a fluorescent acceptor of the ratio-fluorescent sensor. The emission spectrum of AMT overlapped with the excitation spectrum of...
Source: Anal Sci - December 21, 2023 Category: Chemistry Authors: Jing Zhu Xinyu Li Source Type: research