Constructing perfluorinated UiO-67 for enrichment of polycyclic aromatic hydrocarbons in seawater and seabed sediments

Journal of Chromatography A, Journal Year: 2024, Volume and Issue: 1737, P. 465463 - 465463

Published: Oct. 21, 2024

Language: Английский

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A practical and eco-friendly method for the determination of polycyclic aromatic hydrocarbons in açaí-based food products by vacuum-assisted sorbent extraction coupled to gas chromatography-mass spectrometry

Journal of Chromatography A, Journal Year: 2024, Volume and Issue: 1730, P. 465104 - 465104

Published: June 17, 2024

Language: Английский

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Determination of polychlorinated biphenyls in water by CO2-responsive switchable deep eutectic solvent based homogeneous liquid-liquid microextraction

Journal of Chromatography A, Journal Year: 2024, Volume and Issue: 1740, P. 465583 - 465583

Published: Dec. 4, 2024

Language: Английский

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Determination of volatile organic solvents in photoinitiators using headspace gas chromatography

Applied Research, Journal Year: 2024, Volume and Issue: 3(4)

Published: Jan. 31, 2024

Abstract A rapid headspace gas chromatography method has been developed for the determination of residual organic solvents in photoinitiators. Using water‐glyceryl triacetate as solvent, was used to determine levels 11 volatile compounds (VOCs), namely, benzene, toluene, xylene, methanol, ethanol, acetonitrile, acetone, n‐hexane, dichloromethane, tetrahydrofuran, and ethyl acetate, Under selected instrument operating conditions, all were completely separated. detailed analysis conducted on these solvents. The mass concentrations linearly correlated with chromatographic peak area, a linear R 2 is called coefficient ≥ 0.99, relative standard deviation ( n = 5) less than 5.8%. recovery rates n‐hexane toluene 90.3% 102.9%, respectively. exhibits good precision accuracy, making it suitable detection inspection VOC components practical applicability evaluated by blue grade index score 75.0 demonstrating its practicality applicability.

Language: Английский

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GC-MS determination of polychlorinated biphenyls in water using extractive freezing-out of analytes

Industrial laboratory Diagnostics of materials, Journal Year: 2024, Volume and Issue: 90(5), P. 20 - 26

Published: May 23, 2024

A method for determining polychlorinated biphenyls (PCBs) in water using the of concentrating analytes through extractive freezing-out under effect a centrifugal forces (EFC) has been developed. mathematical model analyte extraction three-factor Box-Behnken design demonstrated that content acetonitrile mixture is significant factor, whereas degree PCBs chlorination and concentration are insignificant parameters. Analysis surface area allowed determination optimal range concentration, which fell between 14 21%. 15% provided maximum efficiency 7 different (>92%) across wide concentrations (1.0 – 5000 ng/liter). The relative standard deviations repeatability reproducibility from 4.2 to 6.8% 5.3 8.1%, respectively, accuracy being 10 15%. Petroleum hydrocarbons were not extracted into extract did interfere with PCBs, longer operation detector without any loss sensitivity. Co-extraction polycyclic aromatic chlorinated pesticides affect (95 100%) touch on metrological indicators procedure.

Language: Английский

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Determination of Polychlorinated Biphenyls in Water Using Gas Chromatography–Mass Spectrometry with Extractive Freezing-Out of Analytes

Inorganic Materials, Journal Year: 2024, Volume and Issue: 60(3), P. 342 - 347

Published: March 1, 2024

Language: Английский

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Methyltrimethoxysilane modified tin dioxide microspheres with hydrophobic networks and abundant adsorbed oxygen for efficient solid-phase microextraction of polychlorinated biphenyls

Microchimica Acta, Journal Year: 2024, Volume and Issue: 191(9)

Published: Aug. 14, 2024

Language: Английский

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