微量锡的测定,长久以来缺乏一种特效性好、灵敏度高而又快速准确的方法,许多检验标准仍规定用碘量法测定微量锡。一般测定锡的比色法特效性很差,多采用操作较繁的蒸馏法分离。以二价锡为基础的比色法,如二硫酚法等,不但操作条件严格,且须经过麻烦的还原手续。近年来以四价锡作比色测定的研究报告较多,亦都不够完善。小岛益生用二氧化锰共沉淀法浓集锡,溶解后用氧化苏木素法比色,对锌中锡的测定甚简便,但应用于金属铅则须再用离子交换法分离共沉淀的铅;此外,用二氧化锰法沉淀两次,仍只能分出95%的锡。Гинзбург和 The determination of trace tin has long been a lack of a special effect, high sensitivity and fast and accurate method, many test methods still require the determination of trace tin iodine method. The general determination of tin colorimetric effect is poor, more use of more complex distillation separation. Colorimetric methods based on divalent tin, such as dithiol method, not only the operating conditions are strict, and subject to cumbersome reduction procedures. In recent years, tin tetravalent tin colorimetric determination of the research report are more, are not perfect. Islet probiotic with manganese dioxide coprecipitation concentration of tin, dissolved by oxidative hematoxylin colorimetric determination of tin in zinc is very simple, but the application of metal lead ion exchange method must then be used to separate coprecipitated lead; In addition, precipitation with manganese dioxide twice, still only 95% separation of tin. Гинзбург and