摘要
依据痕量Ｈｇ（Ⅱ）对Ｆｅ（ＣＮ）_６^（４－）－α，α＇－联吡啶配体交换反应的催化作用，建立了快速测定痕量Ｈｇ（Ⅱ）的停流流动注射分析法，引入硫脲作活化剂可显著提高测定的灵敏度。线性范围为０～７５ｎｇ／ｍＬ，方法检测限为０．５ｎｇ／ｍＬ。Ａｇ（Ⅰ）严重干扰测定，Ｆｅ（Ⅲ）、ＣＯ（Ⅱ）以及Ｚｎ（Ⅱ）对测定有轻度干扰，其余大部分常见共存离子不影响测定。用本法测定了水中的汞含量，结果满意。
A stopped flow injection analytic method for rapid determination of mecury(Ⅱ) based on its catalytic effect on the ligand substitution reaction between hexacyan ferrate(Ⅱ) and α,α'-bipyridyl has been established.The introduce of tioures as an acti vator can enhance the sensitivity of the determination significantly.The calibration graph is linear for 0￣75ng/mL Hg(Ⅱ),and the detection limit is 0.5ng/mL.Most for eign ions,except for Ag(I),Fe(Ⅱ),Co(Ⅱ) and Zn(Ⅱ),don't interfere with the deter mination.The method has been applied for the determination of mecury(Ⅱ) in water,and the results are satisfactory.
出处
《烟台师范学院学报（自然科学版）》
1994年第2期125-128,147,共5页
Yantai Teachers University journal(Natural Science Edition)
关键词
汞
水
动力学
比色法
stopped flow injection analytic method,kinetic spectrophotometry method,mecury
