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- W2357695656 abstract "A method was established for the determination of thiourea in noodle and rice flour using liquid chromatography-mass spectrometry(LC-MS/MS) in the multiple-reaction monitoring mode(MRM).Thiourea was extracted by 80% ethanol with ultrasonic wave.The extract was separated on a cation ion exchange column(250 mm×4.6 mm,5 μm) with acetonitrile-(1% acetic acid +0.2% ammonium acetate)(70:30 by volume) as mobile phase at a flow rate of 0.5 mL/min and determined by positive ESI MS/MS.The conditions of extraction and LC-MS/MS were optimized.The parent ion of positive ESI MS was m/z 77,and the daughter ions of MS/MS were m/z 60 and 43.The MRM monitored ions,m/z 77/60 and m/z 77/43,were selected as qualitative ions,and m/z 77/60 was selected as quantitative ion.The recovery of thiourea was in the range of 83%-90% and the RSD was less than 4.0%.The limit of detection was 0.5 mg/kg.The method was proved to be simple and accurate." @default.
- W2357695656 created "2016-06-24" @default.
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- W2357695656 date "2009-01-01" @default.
- W2357695656 modified "2023-09-28" @default.
- W2357695656 title "Determination of Thiourea in Noodle and Rice Flour by Liquid Chromatography-Mass Spectrometry" @default.
- W2357695656 hasPublicationYear "2009" @default.
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