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在一些材料中磷、砷是共存的,由于砷钼杂多酸形成条件与磷钼杂多酸相似,因此砷对磷的测定有干扰。目前应用的光度法中为消除砷对测磷的干扰,普遍采用氢溴酸除砷或萃取分离。但萃取分离,只能解决低含量磷和砷的定量分离,高砷试样中仍需氢溴酸除砷后测定磷。本文利用酒石酸抑制砷钼杂多酸的形
In some materials, phosphorus and arsenic coexist. Since arsenic and molybdenum heteropoly acid are formed under the same conditions as phosphorus and molybdenum heteropoly acid, arsenic has interference with the determination of phosphorus. The spectrophotometry currently used in order to eliminate the interference of arsenic phosphorus, commonly used hydrobromic acid removal or extraction. However, the extraction and separation can only solve the quantitative separation of phosphorus and arsenic at low levels, and the determination of phosphorus after arsenic hydrobromide is still required in arsenic samples. In this paper, the use of tartaric acid inhibition of arsenic molybdenum heteropoly acid shape