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铅基合金中锡的容量法测定,一般采用氧化还原法,时间较长。目前工厂化验室普遍用络合滴定法,但是由于用盐酸和硝酸溶解试样时要考虑试样中锡,锑含量高低按比例加入酸量,不好掌握,溶样时间较长,不能满足炉前分析要求。我们采用稀硝酸和乙二胺四乙酸二钠溶解试样,在几分钟内可完成测定,达到了炉前指导生产的要求。一试剂
Lead-based alloys in the volumetric method for the determination of tin, the general use of redox method, a long time. At present, the laboratory laboratories commonly use complexometric titration, but due to hydrochloric acid and nitric acid to dissolve the sample to consider the sample in the level of tin, antimony content in proportion to the amount of acid, not good grasp, sample time longer, can not meet the furnace Pre-analysis requirements. We use dilute nitric acid and ethylene diamine tetra acetic acid disodium dissolved in the sample, within a few minutes to complete the determination, to guide the production of furnace requirements. A reagent