测定地表水中黄磷的分光光度法研究

Discussion on the Determination of Yellow Phosphorus in Surface Water by Spectrophotometry

应用环己烷萃取地表水中微量黄磷,用溴水消解处理有机相将黄磷定量转化为磷酸盐,以磷酸盐标准溶液制作校准曲线,用钼/锑/抗分光光度法测定磷酸盐。对方法的空白控制、萃取回收率、氧化转化率、测量精密度等问题进行探讨。实验证明,以磷酸盐标准溶液制作校准曲线测定地表水中的黄磷,方法检测结果准确可靠。

The trace quantity of yellow phosphorus was extracted from surface water by cyclohexane, then converted into phosphate with bromine water, and finally determined by spectrophotometry, and the calibration curve was made with phosphate standard solution. The reagent blank control, extraction recovery, oxidation efficiency and determination precision were discussed.