摘要
用聚乙烯醇（ＰＶＡ）为稳定剂，在高酸度下硅钼蓝与罗丹明Ｂ发生离子缔合显色反应。离子缔合物最大吸收波长为５８７ｎｍ，摩尔吸光系数ε５８７＝１．９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，硅量在０．３～６．０μｇ／１００ｍＬ范围内服从比尔定律。此法已经应用于测定纯钼、三氧化钼中的痕量硅，结果满意。
Used polyvinyl alcohols(PVA) as stabilizer,under high acidity,silicon molybdenum blue and rhodamineB(RHB) can be ion associated and color reaction.The ion associated complex exhibits maximum absorption at 587 nm and the molar absorptivity is ε 587 =1.9×10 5L·mol -1 ·cm -1 .Beer's law is obeyed for Si in the range of 0.3～6.0 μg/100 mL.The method has been used for determination of trace silicon in pure molybdenum and molybdenum trioxide with satisfactory results.
出处
《中国钼业》
1998年第1期48-51,共4页
China Molybdenum Industry
关键词
硅
硅钼蓝
罗丹明B
纯钼
分光光度法
Silicon,silicon molybdenum blue,RhodamineB,pure molybdenum,Spectrophotometry
