摘要
对Ｈｇ（Ⅱ）－ｔｎｅｓｏ－４－（４－ＴＭＡＰ）Ｐ－ＤＤＭＡＡ－Ｔｗｅｅｎ８０超高灵敏显色体系的特性进行了研究。该显色体系在ｐＨ８．５～１０．５的硼酸－氢氧化钠介质中最为适宜，显色体系最大吸收波长为４５０ｎｍ处。摩尔阳光系数ε４５０＝４．８×１０５Ｌ／ｍｏ１·ｃｍ，试剂空白在４５０ｎｍ处时等于零。在ＯＤＭＡＡ、Ｔｗｅｅｎ８０条件下，Ｈｇ（２＋）与ｒｎｅｓｏ－４－（４－ＴＭＡＰ）Ｐ的组成比为１：１．在０～１０ｕｇＨｇ（２＋）／２５ｍ１范围内，服从比尔定律，回收率为９８％～１０３％。此法已经应用于测定水和污水中的痕量汞。
The spectrophotometric propertles of Merctiry(Ⅱ)-meso-4-(4-TMAP)-DDMAA-Tween80 super high sensitive colour ligand system were studied.The system has its absorption maximum at 450 nm with the range of pH8.5-10.5 boric-acid-sodium hydroxide medium, while the molaf absorptrivety is 4.8 x 105L/mo1.cm and the blank correction at 450 nm approaches to zero,The composition ratio-is Hg(2+): meso-4-(4-TMAP)p=1:1(in the presence of DDMAA and TweLtn80). Beer,s law is obeyed for Hg tn the range of 0-10ug Hg/25 m1,the recoverv effici-encv were 98%103%.The method has been used for determination of trace rnercury in water and wastewater.
出处
《重庆环境科学》
1994年第5期51-54,共4页
Chongqing Environmental Science
