A method on acrylamide elimination: Comparing and tracing reaction pathways of acrylamide and catechin (catechin quinone) using UHPLC-Q-exactive orbitrap mass spectrometry.

Acrylamide (AA) elimination is significant in thermal-processing foods that rich in carbohydrate and asparagine. Here, catechin (CAT) and its quinone were utilized to investigate and evaluate the reaction rate of AA's characteristics (electrophilicity, oxidizing ability, and nucleophilicity) and trace the reaction pathways to eliminate AA in model system at 25 °C and 150 °C. It is revealed that AA prefers nucleophilic additions with quinone (k = 1.

Stress response and tolerance to perfluorooctane sulfonate (PFOS) in lettuce (Lactuca sativa).

Comprehensive understanding of stress response and tolerance to perfluorooctane sulfonate (PFOS) in plants at physiological, biochemical and molecular levels is scarce. Here, lettuce was cultivated in hydroponic media, to investigate the cross-talk among reactive oxygen species (ROS) production, oxidative damage, antioxidative defense and metabolic regulation in different parts of plants. Under exposure to 5 and 50 μg/L PFOS for 10 days, 8.

Prevalence of pathogens harbouring mobile antimicrobial resistance genes and virulence factors in retail beef and mutton.

Food safety is always a global issue, due to the increased dissemination of antimicrobial resistance and food poisoning related to foodborne bacterial pathogens. The purpose of this study was to assess the risk of potential foodborne bacteria of beef and mutton in retail stores. A total of 134 samples were collected from 24 local markets in Beijing, including raw and cooked beef or mutton, as well as samples derived from the corresponding environment and human beings.

Residue levels of five grain-storage-use insecticides during the production process of sorghum distilled spirits.

Residue levels of dichlorvos, fenitrothion, pirimiphos-methyl, malathion and deltamethrin during sorghum distilled spirits production were examined. The analytical method for these pesticides in sorghum, fermented sorghum, rice hull and distilled spirits was validated through linearity, matrix effect, accuracy and precision, limit of quantification (LOQ) and limit of detection (LOD) parameters. The pesticide residue levels before/after each process of soaking, steaming, fermentation, and distillation were determined by gas chromatography coupled with tandem mass spectrometry (GC-MS/MS).

Analytical method for 44 pesticide residues in spinach using multi-plug-filtration cleanup based on multiwalled carbon nanotubes with liquid chromatography and tandem mass spectrometry detection.

Spinach is one of the most commonly planted vegetables worldwide. A high chlorophyll content makes spinach a complicated matrix in pesticide residue analysis. In this study, a rapid clean-up method was developed for the analysis of pesticide multi-residues in spinach followed by liquid chromatography with tandem mass spectrometry.

Rapid multiplug filtration cleanup with multiple-walled carbon nanotubes and gas chromatography-triple-quadruple mass spectrometry detection for 186 pesticide residues in tomato and tomato products.

This study reports the development and validation of a novel rapid cleanup method based on multiple-walled carbon nanotubes in a packed column filtration procedure for analysis of pesticide residues followed by gas chromatography-triple-quadruple tandem mass spectrometry detection. The cleanup method was carried out by applying the streamlined procedure on a multiplug filtration cleanup column with syringes. The sorbent used for removing the interferences in the matrices is multiple-walled carbon nanotubes mixed with anhydrous magnesium sulfate.