摘要
采用分光光度法对电池中微量汞进行测定。在聚乙烯醇存在下，汞与硫氰酸盐和丁基罗丹明Ｂ形成多元离子缔合物，在 ５８０ｎｍ处有最大吸收波长，０～６μｇ／２５ｍｌ范围内服从比尔定律，表观摩尔吸光系数为 ７．０８×１０５ Ｌ／ｍｏｌ·ｃｍ。本方法具有操作简便，快速，选择性和重现性好的特点。测定中除铁（Ⅲ），锌（Ⅱ）外，电池中存在的其它元素均不干扰测定。
A simple, rapid and reliable spectrophotometric method was used to determine mercury(Ⅱ) in alkaline Zn/MnO2 battery. In the Presence of polyvinyl alcohol(PVA- 124), the reaction of Hg(SCN)24 , a complex formed from Hg(Ⅱ), with thiocyamate and rhodamine B yields a polybasic ion - associate with a wavelength of maximum adsorption at 580 nm, Beer's law was obeyed in the Hg(Ⅱ) concentration range of 0-6μg/25ml. The apparent molar adsorptivity was 7. 08×105L/mol' cm and the limit of detection,0. 0038mg. The analysis was not niterfered by almost all ions in alkaline Zn/MnO2 batteries except Fe3+ and Zn2+, which could be masked by addition of masking agents, such as ascorbic acid and citric acid.
出处
《电池》
CAS
CSCD
北大核心
2000年第5期228-230,共3页
Battery Bimonthly
