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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 recent years, the application of chemiluminescence in the analysis is more and more widely, but for the determination of Ti (Ⅳ) system is still rare, we found that under alkaline conditions, with ClO_ ~ --H_2O_2 can be eosin and glow . At the same time, it was found that CTMAB cationic surfactant had a strong sensitizing effect on the chemiluminescence system. Ti (Ⅳ) had a catalytic effect on the luminescent system, and could enhance the luminescence intensity. The enhanced luminescence intensity and Ti (Ⅳ) A good linear relationship between the determination of trace Ti (Ⅳ), and the development of a new flow injection chemiluminescence determination of titanium method for the synthesis of water samples, aluminum alloy samples obtained satisfactory results, The detection limit was 2.1 × 10 -9 g / mL and the linear range was 4 × 10 -9 ~ 8 × 10 -7 g / mL Ti (Ⅳ). The precision of the test was good and recovery The detection rate was 92.2% ~ 107%, and the RSD was 1.5% for 10 × 10 ~ (-9) g / mL Ti (Ⅳ). The analytical results were in good agreement with the standard values.