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为大办农业普及大寨县,全面落实农业“八字宪法”,适应开展群众性的找矿、验矿,大力寻找我国磷肥资源的需要,特提出磷的钼蓝试纸法进行野外半定量测定。经广泛推广应用,本法准确、快速、容易掌握,相对误差可控制在20％以内,适用于0.2—40％五氧化二磷的野外普查找矿。钼蓝试纸法是依据在强酸性溶液中,磷酸盐与钼酸铵生成磷钼酸的黄色络合物,然后在抗坏血酸溶液中被还原成磷钼
In order to popularize Dazhai County in large-scale agriculture and comprehensively implement the “Eight-Character Constitution” of agriculture, we should meet the need of conducting prospecting and mineral inspection in mass and vigorously looking for the phosphate fertilizer resources in our country. We specially proposed semi-quantitative determination of phosphorus in molybdenum blue test paper. Widely popularized and applied, this method is accurate, fast and easy to grasp. The relative error can be controlled within 20%. It is suitable for prospecting in the field with 0.2-40% P2O5. Molybdenum blue test strip method is based on the strong acid solution, phosphate and ammonium molybdate generated phosphomolybdate yellow complex, and then ascorbic acid solution was reduced to phosphorus molybdenum