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Chemometric Optimization of SPE for the Determination of Multiclass Pesticides in Portable Water Samples by UHPLC-MS/MS
This study aimed on the development of a SPE-UHPLC-MS/MS method for the simultaneous determination of pesticide residues in drinking water samples. A chemometric approach was applied to optimize the efficiency of the SPE pretreatment procedure. This study involved (i) the application of a Full Factorial Design for the screening of the significant factors, (ii) the application of a Central Composite Design for the determination of the optimal conditions and (iii) the evaluation and validation of the significance of the statistically proposed models. Oasis HLB cartridges were used for the extraction. The optimum sample volum...
Source: Bulletin of Environmental Contamination and Toxicology - March 9, 2024 Category: Environmental Health Authors: Garyfallia Drimaropoulou Christophoros Christophoridis Constantinos K Zacharis Konstantinos Fytianos Source Type: research

Insights into Full-congener Profiles of Chlorinated Benzenes in Fly and Bottom Ash: Case Study in Vietnamese Industrial and Municipal Waste Incinerators
Bull Environ Contam Toxicol. 2024 Mar 9;112(3):46. doi: 10.1007/s00128-024-03874-1.ABSTRACTChlorinated benzenes (CBzs) are a group of organic pollutants, which have been industrially or unintentionally produced through various chemical and thermal processes. Studies on full congener profiles of CBzs in waste and environmental samples are relatively limited and not updated. In the present study, concentrations of 12 CBzs were determined in fly ash (FA) and bottom ash (BA) samples collected from one municipal waste incinerator (MWI) and one industrial waste incinerator (IWI) in northern Vietnam. Levels of Σ12CBzs were highe...
Source: Bulletin of Environmental Contamination and Toxicology - March 9, 2024 Category: Environmental Health Authors: Thuy Thi Thu Nguyen Xuan Truong Vuong Minh Binh Tu Minh Hai Trinh Anh Quoc Hoang Source Type: research

Diet Affects Egg Laying, Biomass, and Stable Isotope Values in Tetragnathid Spiders
Bull Environ Contam Toxicol. 2024 Mar 9;112(3):47. doi: 10.1007/s00128-024-03872-3.ABSTRACTRiparian tetragnathid spiders are used as biosentinels of aquatic contamination because they are specialized feeders of aquatic emergent insects and are also prey items for terrestrial predators (e.g., birds). Analysis of both trophic position (e.g., stable nitrogen isotopes) and contaminant concentrations are needed to utilize tetragnathids as biosentinels, which can present challenges when collecting enough biomass to reach analytical detection limits, due to their relatively small size. The purpose of this study was to investigate...
Source: Bulletin of Environmental Contamination and Toxicology - March 9, 2024 Category: Environmental Health Authors: Sarah Kerr Ryan R Otter Source Type: research

Copper-Induced Chemosensory Impairment is Reversed by a Short Depuration Period in Northern Clearwater Crayfish (Faxonius propinquus)
Bull Environ Contam Toxicol. 2024 Mar 1;112(3):45. doi: 10.1007/s00128-024-03863-4.ABSTRACTCrayfish rely on their chemosensory system for many essential behaviours including finding food, finding mates, and to recognize individuals. Copper can impair chemosensation in crayfish at low concentrations; however, it is not clear if the effect is ameliorated once copper is removed. To better understand the effect of and recovery from copper exposure in crayfish, we exposed Northern clearwater crayfish (Faxonius propinquus) to 31.3 [Formula: see text] copper for 24 h and measured the response of the crayfish to a food cue. The cr...
Source: Bulletin of Environmental Contamination and Toxicology - March 1, 2024 Category: Environmental Health Authors: Andrew Arndt Erik J S Emilson William A Dew Source Type: research