原子吸收分光光度法对杂多酸测试的研究——Ⅱ.钼硅杂多酸中Mo和Si配比的测定

STUDIES OF THE DETERMINATION OF HETEROPOLYACID BY ATOMIC ABSORPTION SPECTROMETRY Ⅱ.DETERMINATION OF THE RATIO OF Mo TO Si IN MOLYBDOSILICONACID

本文用原子吸收分光光度法测定钼硅杂多酸中Mo和Si原子配比。仅用钼空心阴极灯,在水溶液中直接测钼,将杂多酸革取到正丁醇中,用间接法测硅,从而测得Mo,Si配比。研究了方法的条件和程序。测试了十二钼硅酸标准样品,并得到相当一致的结果。

The atomic absorption spectrometry was used to determine the ratio of Mo to P in the Molybdophosphate. Using Mommo hollow cathode lamp, molybdenum in the aqueous solution was directly determined. Phosphorus was indirectly determined after heteropolyacid had been extracted into butyl acetate. And then the ratio of Mo to P was calculated. The conditions, procedures and recovery were tested. The standard dodecamolybdophosphate acid sample was determined, whose measuring value was consistent with the real value. All this verified the reliability of the method, which could hopefully be extended into the study of other hetropolyacids.