摘要
报道了一种新型的三氮烯类偶氮染料的合成方法及其与Ｃｄ（Ⅱ）的显色的反应。在Ｔｒｉｔｏｎ Ｘ－１００存在下的弱碱性介质中，该试剂与镉形成 ４： ｌ的红色络合物，最大吸收波长位于５３０ ｎｍ处；表观摩尔吸光系数为 １．９２ ×ｌ０５ Ｌ·ｍｏｌ－１· ｃｍ－１；镉含量在 ０－ ０，５ ｍｇ／Ｌ范围内遵守比耳定律。直接应用于废水中微量镉的测定，结果令人满意。
The synthesis of a new reagent 2 - pyridinediazobenzene and its chromogenic reaction with cadmium(Ⅱ) ion was reported. In a weak alkaline medium, the reagent reacts with cadmium(Ⅱ) to form a red complex of component ratio 4: l(R: Cd). The absorption maximum of the complex is at 530 nm and the apparent molar absorptivity is 1 .92 ×105 L. mol-1. cm-1. Beers law is obeyed for cadmium (Ⅱ ) in the range of 0-0.5 mg/L. This method has been employed to determine trace amount of cadmium(Ⅱ ) in waste water with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1998年第10期1260-1263,共4页
Chinese Journal of Analytical Chemistry
关键词
PDAB
镉
分光光度法
显色反应
分析
Pyridinediazoaminoazobenzene, cadmium, spectrophotometry
