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

Abstract

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.

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

“…Thus far, there are many methods to detect TM. The routine food quality and safety analytical methods are gas chromatography (GC), high-performance liquid chromatography (HPLC), mass spectrometry (MS) and capillary electrophoresis (CE) [ 38 , 39 , 40 , 41 ], but they all have the disadvantages of expensive instrument cost and time-consuming operation. Therefore, it is urgent to build an efficient and fast TM-detection method.…”

A liquid chromatography-time-of-flight/mass spectrometry method for analysis of pesticides and transfer behavior in Radix Codonopsis and Angelica sinensis decoctions

“…Samples of Radix Codonopsis and Angelica sinensis from the local market were analysed for 255 pesticides. The detection results were combined with the previous detection data from our laboratory, 31 and 22 pesticides with high detection frequency were prepared for the transfer rate experiment. The spraying concentration of the 22 pesticides above was set at twice the average concentration detected in the actual TCM piece.…”

Simultaneous determination of glyphosate, glufosinate ammonium and their metabolites in maize and soybean by ultra-performance liquid chromatography with tandem mass spectrometry

“…[15][16][17] To remove the sample impurities for accurate detection, ve typical absorbents, including PSA, C18, GCB, orisil, and MWCNT dispersive absorbents, were used to clean up extraction samples following procedures in the literature. [24][25][26][27] The effects of no sorbent and the types and dosages of sorbents on the recoveries of the target compounds in maize and soybean extracting solutions were determined (Fig. 2).…”