Simultaneous Determination of Inorganic Speciations of As£¬Se and Cr in Juice Drinks by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry

KeyWord:high performance liquid chromatography-inductively coupled plasma mass spectrometry  inorganic morphology of elements  juice drinks  As  Se  Cr

Abstract:

      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£¨¢ö£©£¬Cr£¨¢ó£©£¬As£¨¢ó£©£¬As£¨¢õ£©£¬Se£¨¢ô£©and Se£¨¢ö£©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 ¦Ìg/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£¨¢ó£©and Se£¨¢ô£©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.