摘要
近年来,化学发光在分析上的应用越来越广泛,但用于测定Ti(Ⅳ)体系尚不多见,我们发现,在碱性条件下,用ClO_^--H_2O_2可氧化曙红而发光,同时发现CTMAB阳离子表面活性物质对该化学发光体系有强烈的敏化作用,Ti(Ⅳ)对该发光体系有催化作用,且可增强发光强度,被增强的发光强度与Ti(Ⅳ)浓度有良好的线性关系.据此可进行痕量 Ti(Ⅳ)的测定,并拟定了新的流动注射化学发光测定钛的方法.该法用于合成水样、铝合金试样分析获得满意的效果,检测限达2.1×10^(-9)g/mL,线性范围为4×10^(-9)～8×10^(-7)g/mL Ti(Ⅳ),测试的精密度良好,回收率为92.2％～107％,对含10×10^(-9)g/mL Ti(Ⅳ)连续测11次,其RSD为1.5％,分析结果与标样推荐值颇为一致.
In this paper a new sensitive and selective analytical method for the determination of trace amounts of Ti(Ⅳ) is proposed on the basis of chemiluminescence of eosiny and CTMAB as surface active agent. Flow-injection technique was used. The linear range of the working curves is 4-800 ng/mL and the detection limit is 2.1 ng/mL Ti(Ⅳ). The method was applied to the determination of Ti(Ⅳ) in water and aluminium alloy with satisfactory results.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第5期596-598,共3页
Chemical Journal of Chinese Universities
基金
冶金部科学基金
关键词
流动注射
化学发光
曙红
钛
CTMAB
Flow-injection, Chemiluminescence, Eosiny, Cetyltrimethyl ammonium bromide,Ti(Ⅳ)
