影响地表水中总磷测定的因素探讨

王保勤; 窦艳艳; 张雪璐

引用本文:	王保勤，窦艳艳，张雪璐.影响地表水中总磷测定的因素探讨[J].环境监控与预警,2017,9(2):38-40
	WANG Bao qin， DOU Yan yan， ZHANG Xue lu.Investigation on the Factors Affecting the Determination of Total Phosphorus in Surface Water[J].Environmental Monitoring and Forewarning,2017,9(2):38-40

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影响地表水中总磷测定的因素探讨
王保勤，窦艳艳，张雪璐
南京市环境监测中心站，江苏南京 210013

摘要:

总磷是评价水质的一项重要指标，现对样品中悬浮物（泥沙）含量、加酸保存样品保存时间与调节pH值对总磷测定的影响进行研究。结果表明，随着沉降时间的延长总磷测定值逐渐降低，加酸保存的样品总磷测定值随保存时间的延长而增高，且测定时是否调回中性对测定结果基本无影响。故进行地表水中总磷的测定需严格按照标准规定的样品采样过程控制采样沉降时间，加酸保存,24h以内进行测定，测定时无需调回中性。

关键词: 地表水泥沙自然沉降时间 pH值总磷

DOI：

分类号:X832;O657.32

文献标识码:B

基金项目:

Investigation on the Factors Affecting the Determination of Total Phosphorus in Surface Water

WANG Baoqin， DOU Yanyan， ZHANG Xuelu

Nanjing Environmental Monitoring Center， Nanjing，Jiangsu 210013， China

Abstract:

Total phosphorus content in surface water is an important index to evaluate the water quality. This paper mainly aimed at studying the influences of suspended sediment （silt） in the sample， the different storage time， regulation of pH on the determination of total phosphorus. The results showed that the concentration of total phosphorus decreased with time. And no difference of the total phosphorus concentration was observed between the neutral samples and the samples being added acid in 24 h. During the sampling process， the total phosphorus concentration increased with the increase of storage time， thus the dissolution of total phosphorus in water samples with suspended sediment should be fully considered.

Key words: Surface water Sediment Natural settling time pH Total phosphorus