摘要
在ｐＨ４．５的ＨＡｃ－ＮａＡｃ缓冲介质，有ＰＶＡ和ＴｒｉｔｏｎＸ－１００存在下，硫代硫酸根可使Ａｇ（Ｉ）－邻菲啉－曙红多元络合物褪色。Ｓ２Ｏ３２－浓度在０～１．２μｇ／２５ｍＬ范围内，络合物的褪色程度与Ｓ２Ｏ２－３浓度成正比，表观摩尔吸光系数为８．１０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１．本法用于天然水中微量Ｓ２Ｏ２－３的测定，结果满意。
In the presence of PVA and Triton X-100, colour of polycomponent complex of silver (Ⅰ)-phen-Eosine is faded by thiosulfate in buffer solution of NaAc-HAc(pH 4.5). The decolour degree of complex is proportional to the concentration of thiosulfate in the range of 0-1.2 μ g/25mL with the apparent molar absorptivity of 8.10×10 5 L\5mol -1 \5cm -1 . The proposed method has been applied to the determination of thiosulfate in nature water with satisfactory results.
出处
《广东工业大学学报》
CAS
1997年第S1期113-115,共3页
Journal of Guangdong University of Technology
关键词
硫代硫酸根
褪色
曙红
分光光度法
银
thiosulfate
decolour
Eosine
spectrophotometry
Silver
