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Multiclass screening of ＞ 200 pharmaceutical and other residues in aquatic foods by ultrahigh performance liquid chromatography-quadrupole-Orbitrap mass spectrometer

Multiclass screening of ＞ 200 pharmaceutical and other resi...

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中国化学会第十三届全国分析化学年会

作者： Cong Kong Yang Wang Guang-Xin Yang Yong-Fu Shi Xiao-Yi Lou Hui-Juan Yu Key Laboratory of East China Sea Fishery Resources Exploitation Ministry of Agriculture East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences

A quick screening method of ＞200 pharmaceutical and other residues in aquatic foods based on ultrahigh performance liquid chromatography-quadrupole-Orbitrap mass spectrometer system（UHPLC-Q/Orbitrap MS） was established. In this method, after the addition of 200 μL of 1 M EDTA-Na2, 2 g homogenates were extracted successively with 10 mL of acetonitrile and 10 mL of ethyl acetate. The extracts were combined and dried under nitrogen flow, and redissolved in 0.1% formic acid in acetonitrile/water（4:6, v/v） for analysis. The prepared samples were analyzed through UHPLC-Q/Orbitrap MS system, at Full MS/ddMS2（full-scan data-dependent MS/MS） mode. Identification was performed through the comparison of the sample data with the database for standard chemicals, including the retention time, precursor ion, product ions and isotope pattern for all 206 compounds. Five different aquatic food matrices（carp, shrimp, crab, eel, and mussel） spiked with the analytes at 1, 10, and 50 ng/g were evaluated to assess recoveries, precision, matrix effects, stability, and detection limits using the method. UHPLC analyses were 25 min, and 178-200 analytes met identification criteria at 50 ng/g depending on the matrix. Furthermore, practical application of this method for real samples displayed strong screening capability

关键词： Veterinary Drug aquatic food Screening Orbitrap Pesticide Contaminant Residue

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Non-destructive analysis on the plumpness of hepatopancreas and gonad tissues in live Eriocheir sinensis using low-field 1H magnetic resonance imaging

Non-destructive analysis on the plumpness of hepatopancreas ...

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中国食品科学技术学会第十三届年会

作者： Zhang Hongcai Yan Shiqiang Song Dandan Zhao Yong Cheng Yongxu Pan Yingjie Wu Xugan Zhang Weijia Laboratory of aquatic Products Quality & Safety Risk Assessment(Shanghai) at China Ministry of Agriculture College of Food Science and TechnologyShanghai Ocean University Key Laboratory of Exploration and Utilization of aquatic Genetic Resources at China Ministry of Education College of Fisheries and Life ScienceShanghai Ocean University Shanghai Niumag Electronic Technology Co. LTD

The hepatopancreas and gonad tissues of Chinese mitten crabs(Eriocheir sinensis) are beloved raw food materials in Asian countries because its excellent taste and high nutritional ***,the plumpness of hepatopancreas and gonad tissues denotes the grading scale and the commercial value of a whole *** *** this work,a low-field T-weighted ’ H magnetic resonance imaging(LF-MRI) technique is developed to non-destructively analyze the plumpness of hepatopancreas and gonad in live *** male and female *** were characterized by LF-MRI *** results showed that the plumpness and total lipid content in mature *** were significandy higher than that of immature *** conclusion,the H LF-MRI scanning technology was successfully developed to accurately discriminate the development of ***’ s hepatopancreas and gonad organs in a non-destructive manner,therefore indicating its application in grading commercial live crabs or advising crab fanners on breeding and fattening process.

关键词： eriocheir sinensis magnetic resonance imaging lipid content calculation aquatic food non-destructive analysis

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