摘要
本文继文献［１］之后，进一步将其发展为不经分离连续水相测定混合物中两种价态痕量碲（Ｔｅ）的方法，使用途更广，意义更大。所拟最佳手续不需萃取和浮选，至少可测定混合比例范围Ｔｅ（Ⅳ）：Ｔｅ（Ⅵ）＝１：５～５：１，ε_（６６０）高达５．６１×１０~５Ｌ·ｍｏｌ^（－１）·ｃｍ~１，Δλ高达２１０ｎｍ，并已用于测定我国多种矿泉水中痕量四价和六价碲，方法很灵敏，简便，准确，多方面优于国内外现行的方法。
he paper deseribed the conditions for quantitatively reducing Te(Ⅵ) to Te(Ⅳ),and suggested a simultaneous determination of Te(Ⅳ) and (Ⅵ) in samples of mixture.Beer's law is obeyed from 0 to 15. 0 μg of Te (Ⅳ) and Te(Ⅵ) per 50ml. The proposed methed has been applied to the analysis of valence state of trace tellurium in four Chinese mineral waters, the mean recovery are 99. 2% and 98.7%, and relative standard deviation for Te(Ⅳ) and Te(Ⅵ) not exceed 3. 9% and 8. 7 %,respectively. The method is very sensitive (ε660=5. 61×105L·mol-1·cm-1), simple(Δλ=210nm, and without any extraction and flotation) and reliable, it supeirior to many existing spoctrophotometry for analysis of valence condition of tellurium in manysided. Hence expect that it can well suited to routine analysis.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
1994年第6期16-21,共6页
Food and Fermentation Industries
基金
国家自然科学基金
关键词
碲
矿泉水
分光光度法
价态分析
Tellurium,Mineral water, Spectrophotometry, Analysis of valence conditiion
