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硅酸盐矿样用氢氧化钠-过氧化钠溶熔,在酸性溶中使正磷酸根与钼酸铵作用,生成可溶性磷钼杂多酸,加还原剂还原为钼蓝,其颜色强度与磷量成正比,并且在磷钼二元杂多酸-抗坏血酸-盐酸羟胺体系中加入锑(Ⅲ)可生成磷锑钼三元杂多化合物,以此进行比色测定。此法提高了测定结果的灵敏度、稳定性和准确度,值得进一步探索。
Silicate mineral sample with sodium hydroxide - sodium fluoride melting, in the acidic solution of orthophosphate and ammonium molybdate role to generate soluble phosphomolybdic heteropolyacid, reducing agent is reduced to molybdenum blue, the color intensity and Phosphorus content is proportional to, and in the phosphorus molybdenum binary heteropolyacid - ascorbic acid - hydroxylamine hydrochloride system by adding antimony (III) can generate phosphorous antimony molybdenum ternary heteropoly compounds, in order to colorimetric determination. This method improves the sensitivity, stability and accuracy of the measurement results, it is worth further exploration.