孔雀绿光度法测定河湖底泥中微量黄磷

Spectrophotometric Determination of Microamounts of Phosphorus Yellow in Drainge Deposit with Malachite green

黄磷用苯萃取分离富集，以溴水氧化，转变为磷酸盐进入水相，在０．１８ｍｏｌ／ＬＨ２ＳＯ４介质中，磷酸盐与钼酸铵、孔雀绿生成三元络合物，在６６５ｎｍ波长处有最大吸收，其摩尔吸光系数为９．５×１０４，黄磷量在０－５０ｍｇ／ｍｌ范围内符合比尔定律。

Extraction microamounts of phosphorus yellow in drainge deposit with benzene,then phosphorus yellow is oxidized by bromine water and transtorm into phosphate and enter water phase.In a nedium of 0.18mol/L. sulfuric acid,phosphate with ammonium molybdate,malachite green form a table complex.This complex has an absorption maximum at 655 um,e=9.5×104L/mol'cm.Beer's Law is obeyed in the range of phosphorus yellow concentration 0 to 50 ng/ml.