Results 21 to 30 of about 9,758 (222)

Liquid chromatography–mass spectrometry analysis of carvacrol in chicken tissues

Journal of Veterinary Research, 2022
Carvacrol is an essential oil derived from oregano that is used as a natural additive to improve the efficiency of livestock nutrition. Residues of natural additives such as carvacrol should be monitored in food of animal origin to ensure consumer safety.
Śniegocki Tomasz
doaj   +1 more source

APLICAÇÃO DO MÉTODO µ-QUECHERS PARA A DETERMINAÇÃO DE COMPOSTOS FENÓLICOS EM PIMENTAS (CAPSICUM SPP.) [PDF]

, 2021
Neste trabalho, foi empregado um procedimento de preparo de amostra miniaturizado do método QuEChERS (µ-QUECHERS), seguido de análise por cromatografia líquida de ultra alta eficiência acoplada a espectrometria de massas sequencial (UHPLC-MS/MS) para a ...
RODRIGUES, Carina Alexandra, ZOMER, Ana Paula Lourenção, MALDANER, Liane, VISENTAINER, Jesui Vergílio   +3 more
core   +1 more source

Analysis of insecticide residues in honey by liquid chromatography tandem mass spectrometry using QuEChERS optimized by the Plackett Burman design

CyTA - Journal of Food, 2021
A liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) analytical method using a modified QuEChERS sample preparation for the analysis of insecticide residues in honey was developed and validated.
Ana Paula Ferreirade Souza, Mateus Henrique Petrarca, Patrícia Aparecida de Campos Braga, Nadia Regina Rodrigues, Felix Guillermo Reyes Reyes   +4 more
doaj   +1 more source

Pesticide-Residue Analysis in Soils by the QuEChERS Method: A Review

Molecules, 2022
Pesticides are among the most important contaminants worldwide due to their wide use, persistence, and toxicity. Their presence in soils is not only important from an environmental point of view, but also for food safety issues, since such residues can migrate from soils to food.
Miguel Ángel González-Curbelo, Diana Angélica Varela-Martínez, Diego Alejandro Riaño-Herrera   +2 more
openaire   +3 more sources

Evaluation of method performance and matrix effect for 57 commonly used herbicides in some vegetable families using LC-MS/MS determination

Cogent Food & Agriculture, 2020
A modified QuEChERS method was employed with LC-MS/MS to evaluate the matrix effects of 12 different vegetables matrices in 57 globally used herbicides. The average recoveries of pesticides at different concentrations varied between 70 and 120%.
Ali S. Mohammed, Gouda A. Ramadan, Ahmed I. Abdelkader, Sohair A. Gadalla, Mohsen M. Ayoub, Najat A. Alabdulmalik, Wasan A. AL Baker   +6 more
doaj   +1 more source

Optimization and validation of LLE-LTP and QuEChERS Methodologies for determining 2,4-D in water samples [PDF]

, 2020
2,4-Dichlorophenoxyacetic acid (2,4-D) has been one of the main herbicides used to control weeds, however, due to its high use it can promote episodes of environmental contamination.
Lázaro Chaves Sicupira, Flaviano Oliveira Silvério, Gevany Paulino de Pinho, Lucas Victor Pereira de Freitas   +3 more
core   +1 more source

Determination of Cyhalofop-butyl and Cyhalofop-acid Residues in Cereals and Oilseeds by QuEChERS-UPLC

Shipin gongye ke-ji, 2022
Objective: The method of QuEChERS-UPLC was established for the simultaneous determination of cyhalofop-butyl and cyhalofop-acid residues in cereals and oilseeds.
Hongxia PENG, Ya LIU, Li YANG, Xinming LV, Xinzhong XU, Xin XU, Ke WANG   +6 more
doaj   +1 more source

Determination of 214 pesticide residues in green vegetables using QuEChERS-ultra high performance liquid chromatography coupled with quadrupole time of flight mass spectrometry

Zhongguo shipin weisheng zazhi, 2020
Objective A method for the determination of 214 pesticide residues in green vegetables by QuEChERS using ultra high performance liquid chromatography coupled with quadrupole time of flight mass spectrometry was established.
Feng ZHU, Jie YU, Zongli HUO, Hualiang LIU, Hao ZHANG, Deye LIU, Wenliang JI   +6 more
doaj   +1 more source

Simultaneous Determination of Major Antibiotics Veterinary Drug Residues in Pork by UHPLC-Q-TOF/MS

Shipin gongye ke-ji, 2022
A method for simultaneous determination of 10 veterinary antibiotics residues in pork by QuEChERS purification combined with ultra performance liquid chromatography tandem quadrupole-time of flight mass spectrometry (UHPLC-Q-TOF/MS) was developed.
Fei PEI, Ping HAN, Jie WANG, Ning MA, Anxiang SU, Wenjian YANG, Qiuhui HU   +6 more
doaj   +1 more source

QuEChERS extraction of benzodiazepines in biological matrices

Journal of Pharmaceutical Analysis, 2013
Two common analytical chemical problems often encountered when using chromatographic techniques in drug analysis are matrix interferences and ion suppression. Common sample preparation often involves the dilution of the sample prior to injection onto an instrument, especially for liquid chromatography-mass spectrometry (LC-MS) analyses.
Jessica L. Westland, Frank L. Dorman
openaire   +3 more sources