摘要
在酸性介质中，硫化物与对氨基二甲基苯胺形成亚甲蓝，并与十二烷基磺酸钠缔合，可使吸光度提高．该缔和物于６６０ｎｍ处有最大吸收，摩尔吸光系数为１２０×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，Ｓ２－含量在０～２４μｇ／２５ｍＬ范围内符合比尔定律．该方法用于天然水中微量硫化物的测定。
In the acid medium,sulfide forms methylene blue with N,N-dimethyl-p-phenylene diamine.The sensitivity of the reaction has been made up by adding sodium dodecane sulfonate.The maximum absorption of the association compound is at 660nm and the molar absorptivity is 1 20×10 4L·mol -1 ·cm -1 .The Beer′s law is obeyed in the range of 0～24 μ g/25ml.The present method has been applied to determine the sulfide in natural water with satisfactory results.
出处
《广东工业大学学报》
CAS
1999年第2期48-51,共4页
Journal of Guangdong University of Technology
关键词
硫化物
缔合
分光光度法
表面活性剂
亚甲基蓝
Sulfide
N-N-dimethyl-p-phenylene diamine
Sodiun dodecane sulfonate
association Spectrophotometry
