过硫酸盐氧化法测定海水中溶解总磷  

The Decomposition and Analysis Method for Dissolved Total Phosphorus in Sea Water by Persulphate Oxidation

作　　者：谭加强[1] 于志刚[1] 林桂炽[1] 米铁柱[1] 

机构地区：[1]青岛海洋大学化学化工学院,青岛266003

出　　处：《青岛海洋大学学报（自然科学版）》2001年第2期256-262,共7页Journal of Ocean University of Qingdao

基　　金：国家自然科学基金重大项目! (4 9790 10 0 1);山东省自然科学基金课题!(Q 95 B0 314)

摘　　要：实验研究在碱性和酸性条件下过二硫酸钾高温氧化四种不同类型含磷标准化合物在海水中的回收率和影响回收率的因素。结果表明 :在碱性条件下过二硫酸钾高温氧化可使海水中非聚磷类化合物完全回收 ,而聚磷类化合物回收率不高 ,延长消化时间聚磷类化合物的回收率有一定提高。除个别化合物外 ,各类含磷化合物在酸性条件下可被定量回收。依此 ,建立酸性过硫酸盐氧化法分解测定海水中溶解态总磷的方法。Experimental studies have been conducted on the decomposition efficiency of four different types of organic and inorganic phosphorus compounds in seawater under acid or basic condition by persulphate oxidation. The influence factors on decomposition efficiency, such as digestion time and pH were identified. It was shown that non-condensed phosphate could be decomposed completely by persulphate. But in alkali condition, condensed phosphate can only be decomposed partly. Almost 100% decomposition efficiency could be reached for all types of compounds containing phosphorus under acid condition. A persulphate oxidation method in acid medium for decomposition and analysis of dissolved total phosphorus in seawater was proposed.

关 键 词：溶解态总磷 过硫酸盐氧化法 回收率 海水 聚磷类化合物 

分 类 号：P734[天文地球—海洋化学]