摘要
本文采用流动注射分析(FIA)技术.载流中含有Hg(SCH)2和Fe2+,注入试样中的氯离子与Hg(SCH),反应,释放出SCH-,后者与Fe2+形成红色Fe(SCH)给离子,其强度用分光光度法在480nm处测定.记录的吸收峰高度与试样中氯离子浓度成正比.线性范围6.0—18μm/mLCl,检出限达0.12μg/mLCl-.对6.0μg/mLCl-连续测定11次,其RSD为3.9%.出样频率为90样/小时.方法已用于水样中氯离子的测定.
A FIA method for the routine determination of chlorides in water is used in the paper. The carrier stream contains Hg(SCN)2 and Fe(Ⅲ). The chloride of the injected sample reacts with Hg(SCN)2 and liberats SCN-,which in turn acts with Fe (Ⅲ ) turned into the red-colored complex ion Fe (SCN), the intensity of which is measured by spectrophotometry is 480um. The height of the recorded absorhance peak is then proportional to the concentration of chlorde in the sample. The determinable range and detection limit are 6. 0 to 18. 0mg/ml and 0. 12mg/ml respectively. The relative standard deviation is 3. 9%. The method has been applied to determine chlorides in water samples.
出处
《环境保护科学》
1994年第2期52-54,共3页
Environmental Protection Science
关键词
流动注射分析
分光光度法
氯离子
Flow Injection Analysis
Spectrophotometry
chlorides.