Simultaneous Determination of Inorganic Speciations of As,Se and Cr in Juice Drinks by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry
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KeyWord:high performance liquid chromatography-inductively coupled plasma mass spectrometry  inorganic morphology of elements  juice drinks  As  Se  Cr
L? Ya-ning,SONG Wei,SHEN Gui-lan,JIN Yu-juan 1.合肥海关技术中心;2.食品安全分析与检测安徽省重点实验室
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      A high performance liquid chromatography(HPLC)coupled with inductively coupled plasma mass spectrometric(ICP-MS) method was developed for the determination of six kinds of inorganic elements,including Cr(Ⅵ),Cr(Ⅲ),As(Ⅲ),As(Ⅴ),Se(Ⅳ)and Se(Ⅵ)in juice drinks.After ultrasonic extraction,the samples were added with EDTA solution,separated with a C8 column using 0.1 mmol/L tetrabutyl ammonium hydroxide,0.1 mmol/L ammonium acetate and 10% methanol as mobile phases,and then determined by ICP-MS.The DRC mode was used to eliminate the interference and ensure the accuracy of determination.The detection limits for the 6 element speciations were 0.34,0.20,0.50,0.40,0.82 and 0.90 μg/L,respectively.The recoveries for the analytes were between 79.5% and 112% with the relative standard deviations(RSDs)(n=6)less than 5.0%.Using this method,six inorganic speciations were undetected in apple juice,while Cr(Ⅲ)and Se(Ⅳ)were detected in blueberry juice with contents of 0.007 mg/kg and 0.015 mg/kg,respectively,and 3 element speciations were detected in cereals juice with contents of 0.008-0.034 mg/kg.