Results 251 to 260 of about 936,931 (309)

Automated QuEChERS for the determination of 482 pesticide residues in Radix codonopsis by GC-Q-TOF/MS and LC-Q-TOF/MS

Analytical Methods, 2021
A rapid and automated QuEChERS procedure has been developed for high-throughput screening of 482 pesticide residues in Radix codonopsis by GC-Q-TOFMS and LC-Q-TOFMS.
Qiaoying Chang   +10 more
openaire   +4 more sources

Complementation of UPLC-Q-TOF-MS and CESI-Q-TOF-MS on identification and determination of peptides from bovine lactoferrin

Journal of Chromatography B, 2018
Digested peptides of bovine lactoferrin as the functional hydrolysates were identified by the Q-TOF tandem mass spectrometry (Q-TOF-MS) coupled with ultra performance liquid chromatograph (UPLC) and capillary electrophoresis (CE). The former (UPLC-Q-TOF-MS) identified 106 peptides while the latter (CE-Q-TOF-MS) characterized 102 peptides after ...
Hui, Chen   +6 more
openaire   +2 more sources

Metabolic responses of the growing Daphnia similis to chronic AgNPs exposure as revealed by GC-Q-TOF/MS and LC-Q-TOF/MS

Water Research, 2017
Silver nanoparticles (AgNPs) are one of the most widely used nanomaterials. Their fast-growing utilization has increased the occurrence of AgNPs in the environment, posing potential health and ecological risks. In this study, we conducted chronic toxicity tests and investigated the metabolic changes of the growing Daphna similis with exposure to 0, 0 ...
Bo Zhang   +6 more
openaire   +2 more sources

Analysis of hydraulic fracturing additives by LC/Q-TOF-MS

Analytical and Bioanalytical Chemistry, 2015
The chemical additives used in fracturing fluids can be used as tracers of water contamination caused by hydraulic fracturing operations. For this purpose, a complete chemical characterization is necessary using advanced analytical techniques. Liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (LC/Q-TOF-MS) was used to ...
Imma, Ferrer, E Michael, Thurman
openaire   +2 more sources

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