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微量锰的比色测定方法,常用高锰酸盐比色法。此法虽较特效和准确,但在分析三氧化钼及金属钼中的微量锰时,需经沉淀分离,操作繁琐,且灵敏度达不到要求。用甲醛肟比色测定锰,前人已进行很多工作,我们在前人工作的基础上,拟定了用甲醛肟分光光度法测定三氧化钼及金属钼中微量锰的方法,具有灵敏、准确和操作简便等特点,适用于含锰量为1×10~(-4)％—4×10~(-3)％的样品分析。 (一)主要试剂 1.铜试剂:4％(新鲜配制,过滤后使用)。 2.甲醛肟溶液:1M,取盐酸羟胺7克溶于水中,加入38％甲醛20毫升,
Manganese colorimetric assay, commonly used permanganate colorimetry. Although this method is more specific and accurate, but in the analysis of trace amounts of manganese trioxide and molybdenum metal, the need to be separated by precipitation, the operation cumbersome, and the sensitivity does not meet the requirements. Formaldehyde oxime colorimetric determination of manganese, many people have done a lot of work, we work on the basis of predecessors, developed with formaldehyde oxime spectrophotometric determination of molybdenum trioxide and molybdenum in the trace manganese with sensitive, accurate and Easy to use and so on. It is suitable for the sample analysis with the content of manganese in the range of 1 × 10 -4% to 4 × 10 -3%. (A) the main reagent 1 copper reagent: 4% (freshly prepared, filtered and used). 2. Formaldehyde oxime solution: 1M, hydroxylamine hydrochloride 7 g dissolved in water, add 38% formaldehyde 20 ml,