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我们用结晶紫做显色剂,聚乙烯醇做增溶剂,使砷钒钼杂多酸与结晶紫形成的离子缔合物溶于胶束中,在水相中直接测定微量砷。操作简单,灵敏度高。应用本法测定污水中的微量砷,所得结果与AgDDTC法一致。实验部分一、仪器及主要试剂 1.72型分光光度计。 2.雷磁25型酸度计。 3.钒钼混合液的配制:取14毫升0.2％的偏钒酸铵,26毫升4％钼酸铵,置于
We use crystal violet as color developer and polyvinyl alcohol as solubilizer to dissolve the ion-association of arsenic-vanadium-molybdenum heteropoly acid and crystal violet in micelles to directly measure trace arsenic in aqueous phase. Simple operation, high sensitivity. This method is applied to the determination of trace arsenic in sewage, and the result is consistent with AgDDTC method. Experimental part First, the instrument and the main reagent 1.72 spectrophotometer. 2. Ray magnetic 25 type acid meter. 3. Preparation of vanadium-molybdenum mixed solution: Take 14 ml of 0.2% ammonium metavanadate, 26 ml of 4% ammonium molybdate, placed