摘要
提出了罗丹明６Ｇ褪色光度法测定微量氯酸根离子的新方法。研究了氯酸根在盐酸介质中氧化罗丹明６Ｇ使其褪色的最佳条件。最大吸收波长λｍａｘ在５２５ｎｍ处，其表观摩尔吸光系数ε为１．２２×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，氯酸根的质量浓度在０～６μｇ／２５ｍＬ范围内符合比耳定律。已用于化学试剂中氯酸根的测定，结果满意。
new
photometric method for the determination of microamounts of chloranion is proposed in this
paper.The optimum conditions for the oxidation of rhodamine 6G by chloranion in HCl medium
were studied.A decrease of absorbance of rhodamine 6G resulted from its oxidation by
chloranion and a linear relationship is established between the decrease of absorbance and
chloranion concentration of 06g/25mL.The molar absorptivity is 1.22105Lmol-1cm-1.The
proposed method has been applied to the determination of microamounts of chloranion in
synthetic samples and chemical reagents with satisfactory results.
出处
《分析试验室》
CAS
CSCD
1999年第3期77-79,共3页
Chinese Journal of Analysis Laboratory
基金
江苏省教委自然科学基金
关键词
罗丹明6G
氯酸根
褪色光度法
测定
Rhodamine
6G
chloranion
decoloration spectrophotometry
