海水监测中总氮小于三氮的原因分析及改进建议  

Cause Analysis and Improvement Suggestion for Total Nitrogen Less than Three Nitrogen Compounds in Seawater Monitoring

作　　者：仇镇武 QIU Zhen-wu(Ecological Environment Monitoring Station of Zhongshan,Guangdong,Zhongshan,Guangdong 528400,China)

机构地区：[1]广东省中山生态环境监测站,广东中山528400

出　　处：《四川环境》2025年第2期134-140,共7页Sichuan Environment

基　　金：2024年度中山市第一批社会公益与基础研究项目(2024SYF03);中山市入海河流沉积物中特征金属元素的调查研究(2024B2027、240424075208605)。

摘　　要：通过对海水从样品采集到监测全程的分析和对比试验,找出总氮测定结果小于氨氮、亚硝酸盐氮、硝酸盐氮测定结果之和的原因。根据采集样品、样品保存、相关试剂配制以及监测方法选择中常见的不符合项提出改进建议。海水中总氮和三氮的监测受盐度影响较为突出,总氮小于三氮之和的原因具有一定的复杂性和多样性,应从反应机理分析原因提出有针对性的建议及采取有效的措施改进。The reason that the measured total nitrogen is less than the sum of ammonia nitrogen,nitrite nitrogen and nitrate nitrogen(hereinafter referred to as“three nitrogen compounds”)is found by analyzing and comparing the whole process of seawater sampling and monitoring.In this paper,suggestions are proposed for improvement according to the common non-conformance items in sample collection,sample retention,reagent preparation,and selection of monitoring methods.The monitoring of total nitrogen and nitrogen compounds in seawater is significantly affected by salinity,and the reason why total nitrogen is less than the sum of three nitrogen compounds is complex and diverse.It is necessary to put forward pertinent suggestions and take effective measures to improve the reaction mechanism.

关 键 词：总氮 盐度 三氮 氨氮 硝酸盐氮 亚硝酸盐氮 

分 类 号：O657.32[理学—分析化学] X834[理学—化学]