摘要
将分光光度法和流动注射技术联用，建立了一种可用于在线快速检测环境水样中痕量Zn（Ⅱ）的新方法。通过实验优化了锌-PAN-吐温80-四硼酸钠显色体系及分析流路。在优化条件下，锌离子在5-400μg·L^-1范围内具有良好的线性（相关系数r=0．9998），检出限为1．3μg·L^-1，相对标准偏差（RSD）为1．24％（20μg·L^-1Zn离子，n=15），采样频率为24个样／h。应用于环境水样中Zn（Ⅱ）的测定，回收率在93．5％～104．0%之间。该方法具有仪器简便、方法简单、测量快速、灵敏度较高、准确度较好、线性范围较宽等特点，适用于环境水样中锌离子的检测。
A new method for the on-line rapid and direct detection of trace zinc ions in environmental water is proposed, which is based on the Flow Injection Analysis （FIA） coupling with Spectrophotometry. In this experiment, the chromogenicsystem of Zinc-PAN-Tween80-Sodium tetraborate and analyzing flow-path are optimized. Under the optimized condition,The linear range and detection limit is 5-400 μg·l^-1 and 1.3 μg/L（correlation coefficient r =0. 9998）, respectively. The relative standard deviation （RSD） is 1.24 % at the 20 μg·l^-1 level（ n = 15）. The sample throughput is 24 times per hour. And the recovery percentages range from 93. 5 % to 104. 0 % for determination of environmental water. It is a simple, rapid, highly sensitive,well accurate, wide linear range methodology. The proposed method is successfully applied to the determination of zinc ions in environmental water samples.
出处
《皮革科学与工程》
CAS
2008年第4期50-53,共4页
Leather Science and Engineering
基金
国家863课题"金属元素自动分析系统标准化"(项目编号:200514)
关键词
Zn(Ⅱ)
流动注射
分光光度法
环境水样
Zinc
flow inject analysis
spectrophotometry
environmental water samples
