摘要
报道一种用液相色谱分离,薄层电解池串联双电?安培法测定水样中七种芳香硝基化合物的方法。首先在上游电极还原分析物,然后检测在下游电极氧化的产物,避免了样品和流动相中溶解氧和痕量重金属离子的干扰,易实现自动化。在优化的实验条件下,本方法的线性范围为2.0×10^(-7)～4.0×10^(-5) g/ml,检测限为 1.0～2.0 ng,最大相对标准偏差为5.2％,对水样测定的回收率为93～107％。
The title determination was carried out by means of an dual-electrode amperometric detector. Analytes were first reduced at upstream electrode and the reaction products were then detected by oxidation at the downstream electrode. So, the influence of dissolved oxygen and trace amounts of heavy metals in mobile phase and sample was eliminated. Thus, exhaustive removal of dissolved oxygen before analysis is not required and the method can be easily automated. Under the optimized conditions, the assay was linear in a concentration range oi 2.0 ×10-7-4.0 x10-5 g/ml and had lower detection limits of 1.0-2.0 ng using a 10 μl sample. The largest relative standard deviation was 5.2%. The recovery of the detection of water samples was 93-107%.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1989年第3期292-296,共5页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金资助课题
关键词
液相色谱
电化学
芳香硝基
化合物
Liquid chromatography, Amperometfy, Aromatic nitro compounds, Amperometric detector
