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测定痕量锡可采用分光光度法、荧光分析法等。目前,高灵敏度的化学发光分析法已用于多种金属离子的分析,但是,锡的化学发光分析尚未见报道。本文采用的反相流动注射化学发光分析(rFIA-CL)法是以试样作载流,定量注入试剂到试液流中的一种分析新技术。rFIA法能在一定程度上克服基线漂移,提高分析灵敏度,减少试剂消耗,且重现性好。我们观察到邻菲啰啉(phen)在碱性介质中被H_2O_2氧化时有较强的化学发光,痕量Sn(Ⅳ)对
Determination of trace tin spectrophotometry, fluorescence analysis. At present, highly sensitive chemiluminescence analysis has been used for the analysis of various metal ions, however, the chemiluminescence analysis of tin has not been reported yet. The reversed-phase flow injection chemiluminescence (rFIA-CL) method used in this paper is a new analytical technique that uses a sample to carry a reagent and inject a reagent into the test solution. The rFIA method can overcome the baseline drift to a certain extent, improve the sensitivity of analysis, reduce reagent consumption, and reproducibility is good. We observed that phenanthroline (phen) was strongly chemiluminescent when oxidized by H 2 O 2 in alkaline media, and trace amounts of Sn (Ⅳ)