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当前位置: 首页 > 文章 > 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 食品工业科技 2017,38 (20) 245-249
Position: Home > Articles > Rapid determination of trace chromium in food with standard addition calibrating technique by flow injection chemiluminescence method Science and Technology of Food Industry 2017,38 (20) 245-249

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

作  者：
高向阳;张娜;郭楠楠;魏龙;江晓琴
单  位：
郑州科技学院食品科学与工程系
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
摘  要：
为建立一种快速测定食品中微量铬的新方法,以贼小豆、玉米、燕麦为样品,根据Cr~(3+)对Luminol-H_2O_2化学发光体系的线性催化特性,用标准加入校正法快速测定。结果表明:在试液p H为2.50和增益为1的最佳条件下,对1.00×10~(-12)mol/L的Cr~(3+),测定的相对标准偏差(n=11)RSD为3.2%,按3倍标准偏差计算的检出限为2.30×10~(-13)mol/L,加标回收率为92.0%~98.1%,贼小豆、玉米、燕麦样品中铬的含量依次为46.64、31.22、38.66μg/g。该方法选择性好、快速准确、操作简便、重现性好、灵敏度高、用于粮食样品中铬的测定,结果令人满意。
译  名：
Rapid determination of trace chromium in food with standard addition calibrating technique by flow injection chemiluminescence method
作  者：
GAO Xiang-yang;ZHANG Na;GUO Nan-nan;WEI Long;JIANG Xiao-qin;Department of Food Science and Engineering,Zhengzhou University for Science and Technology;
单  位：
Department of Food Science and Engineering,Zhengzhou University for Science and Technology
关键词：
flow injection chemiluminescence;;standard addition calibrating technique;;micro-chromium;;vigna minima;;corn;;oat
摘  要：
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 Cr~(3+) linear catalysis properties to Luminol-H_2O_2 system.The results indicated that the relative standard deviation was 3.2%( n = 11) for 1.00 × 10~(-12)mol/L Cr~(3+)standard solution under the optimal determination condition for the p H2.50 of test solution and transmission gain of 1.The lowest detection limit of Cr~(3+) was 2.30 ×10~(-13)mol/L.The 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.

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