全自动流动注射分析仪快速测定渔业水域水质中的铬(Ⅵ)  

Determination of hexavalent chromium in water sample by fast flow injection spectrophotometry

作　　者：黎飞[1,2] 王扬[2] 张成[2] 黄城[2] 

机构地区：[1]浙江大学动物科学学院,杭州310058 [2]浙江省水产质量检测中心,杭州310012

出　　处：《中国渔业质量与标准》2012年第4期91-94,共4页Chinese Fishery Quality and Standards

基　　金：浙江省分析测试基金(No.2009F70069);浙江省水产技术推广总站站长基金(No.TGZ200801)

摘　　要：利用铬(Ⅵ)和二苯碳酰二肼显色反应,溶液在540nm波长处有最大吸光值,且显色程度与铬(Ⅵ)浓度线性相关的相关原理,建立了一种监测水中六价铬含量的流动注射分析方法。研究发现,在设定的最佳条件下,单个样品分析时间为133s,测定频率为27样/h,Cr(Ⅵ)浓度在0～400.0μg/L范围内与显色程度有良好的线性关系,线性方程为y=0.01255x-0.00401,相关系数r为0.99998,相对标准偏差RSD为0.59%,该法的检出限是0.4μg/L,加标回收率在91.0%～108%。结果表明,本研究建立的流动注射分析方法具有简单、快速、灵敏、选择性强、实用性强等特点,适合实验室大量样品的检测,可用于监控渔业水域水质中六价铬的含量。The study aimed to establish a flow injection analysis （FIA） detection method of chromium （ VI ） in water samples. Chromium （VI） can cause a color reaction with the diphenyl carbazide （DPC）-which has the maximum absorption wavelength at 540 nm and there was a linear relationship between the degree of color and chromium （ VI） concentration. The time used for a single sample analysis was 133s and frequency of determination was 27 samples / h. The range of measurement was from μg/L to 400.0μg/L and the regression equation was y =0. 1255 x -0. 004 01 ,with a correlation coefficient of 0. 999 98. The detection limits of the method was 0.4 μg/L. The relative standard deviation （RSD） was 0.59% and the recovery of standard addition in water sample was 91.0% - 108 %. This FIA detection method of chromium （ VI ） was a simple, accurate and highly selective method, especially suitable for laboratory detection of a large number of samples, with practicality.

关 键 词：流动注射 铬(VI) 水质 渔业 监测 二苯碳酰二肼 

分 类 号：X832[环境科学与工程—环境工程]