摘要
用离子色谱-电化学检测法同时测定溴和碘。以0.025mol/ L硝酸钠为淋洗液,其酸度为pH6.0.施加电压为+0.2V,对测定溴和碘量为适宜。方法可用于天然水中μg/L级溴和碘的测定。溴和碘的最低检测限各为0.4、1.0μg/L。当溴浓度为3.2μg/L,碘浓度为62μg/L时,变异系数各为3.4％及1.8％。
A method of simultaneous determination of bromide and iodide by ion chromatography with electrochemical detection has been reported. The effects of eluent pH and concentration on the ion chromatographic separation of these ions was studied. Sodium nitrate of 0.025mol/ L, pH 6.5 was used as eluent. The applied potential of +0.2V both for bromide and iodide was approprite. The method can be applied to the determination of bromide and iodide in natural waters at μg/ L levels. The detection limits for bromide and iodide are 0.4, 1.0μg / L respectively, and the coefficient variations for the concentration of 3.2(Br-),62(I-) μg / L are 3.4, 1.8% respectively.
出处
《干旱环境监测》
1992年第1期6-9,61,共4页
Arid Environmental Monitoring
基金
国家科委自然科学基金资助项目
关键词
溴
碘
离子色谱法
监测
水样
Bromide
Iodide
Ion chromatography
Water sample.
