泥磷中P_4的测定  

Determination of P_4 in Phosphorus Sludge

作　　者：高宣华 赵普琇 

机构地区：[1]云南天安化工有限公司中心化验室,质量管理部,云南安宁650300

出　　处：《云南化工》2014年第5期52-54,共3页Yunnan Chemical Technology

摘　　要：研究了泥磷中 P4的测定方法。在一定温度下，用浓硝酸将泥磷中的 P4氧化、分解为磷酸和偏磷酸，用硫酸氧化并除去 HF、NO、NO2等干扰杂质，再用王水进一步将少量未氧化的偏磷酸完全氧化生成磷酸，然后采用磷钼酸喹啉重量法测出 P4含量。该方法回收率在99.51％～100.14％之间，精密度（RSD）为0.26。The determination of P4 in the phosphorus sludge was studied.At a certain temperature, P4 in the phosphorus sludge was oxidized with concentrated nitric acid,and decomposed into phosphoric acid and metaphosphoric acid,oxiation with sulfuric acid to move HF,NO,NO2 and other impurities,then with a small amount of aqua regia for the further completely metaphosphate oxidation of the small amount meta-phosphoric acid to be phosphoric acid,and then using quinoline phosphomolybdate gravimetric method to measure P4 content.The recoveries were between 99.51～100.14,and the precision （RSD）was 0.26.

关 键 词：泥磷 P4 磷酸 重量法 

分 类 号：O655[理学—分析化学]