连续流动分析法测定海水中磷酸盐

摘要

The reaction of phosphate and molybdate which was catalyzed by potassium antimony tartrate can be reduced by ascorbic acid to generate a blue compound at pH＜1. The compound was detected at 880nm. The results indicate that the linearity of phosphate is good.The precision and accuracy can accord with the requirement of method GB 17378.1998. Therefore, this method can satisfy the requirement of detection of large sample.%建立了连续流动分析测定海水中磷酸盐的方法,在pH值小于1条件下,磷酸盐和钼酸盐在酒石酸锑钾的催化作用下可以被抗坏血酸还原生成一种蓝色化合物,于880nm下比色测定.方法检出限为0.240μg·L-1,标准曲线线性良好.精密度和准确度均可符合国标方法要求,操作简便,能满足大批量海水样品及时准确分析的要求.