食品工业科技2017，Vol.38Issue(20)：245-249,5.DOI:10.13386/j.issn1002-0306.2017.20.043
流动注射化学发光-标准加入校正法快速测定食品中的微量铬
Rapid determination of trace chromium in food with standard addition calibrating technique by flow injection chemiluminescence method
摘要
Abstract
With vigna minima,corn and oats as samples,a new method of rapid determination food trace chromium was established.The total content of chromium was determined by standard addition calibrating technique with flow injection chemiluminescence analysis,which based on Cr3+ linear catalysis properties to Luminol-H2 O2 system.The results indic ated that the relative standard deviation was 3.2％ (n =11)for 1.00 × 10-12 mol/L Cr3+ standard solution under the optimal determination condition for the pH2.50 of test solution and transmission gain of 1.The lowest detection limit of Cr3 + was 2.30 × 10-13 mol/LThe average mass of Cr in vigna minima,corn,oats sample was 46.64,31.22 and 38.66 μg/g.The recoveries were in the range of 92.0％ ～98.1％.This method is fast,sensitive with good selectivity and good linear relationship.Therefore it can be used to determine the micro chromium in food samples with satisfactory analytical results.关键词
流动注射化学发光/标准加入校正法/微量铬/贼小豆/玉米/燕麦Key words
flow injection chemiluminescence/standard addition calibrating technique/micro-chromium/vigna minima/corn/oat分类
轻工纺织引用本文复制引用
高向阳,张娜,郭楠楠,魏龙,江晓琴..流动注射化学发光-标准加入校正法快速测定食品中的微量铬[J].食品工业科技,2017,38(20):245-249,5.基金项目
郑州市科技局新兴产业研究与开发基金资助(153PXXCY186). （153PXXCY186）
