摘要
基于在ｐＨ＝４．０的柠檬酸－磷酸氢二钠缓冲溶液中，以碘化钾还原天青Ⅰ作指示反 应，建立了测定汞见的快速、简便的催化动力学光度分析的新方法。方法的线性范围为０．２５ ～４．５０ｍｇ／Ｌ；进样频率为 ４８／ｈ。 １１次重复测定的相对标准偏差小于 １．９％。该方法应用于香 烟、自来水中汞见的测定，结果满意。
A rapid and simple flow-injection catalytic spectrophotometric method has been developed for the determination of mercury(Ⅱ) based on its catalytic effect on the reduction reaction of azure I by iodide in pH = 4.0 critic acid-sodium hydrogen phosphate buffer solution. The calibration curve was linear between 0.25 and 4. 50 mg/L, and the sampling rate was 48/h. The relative standard deviation of eleven replicates is less than 1.9%. The method has ho applied to the determination of mercury in cigarette and running water with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2000年第9期1155-1157,共3页
Chinese Journal of Analytical Chemistry
关键词
香烟
汞
测定
自来水
流动注射催化光度法
Flow injection analysis, catalytic spectrophotometric method, azure I, mercury(Ⅱ)
