摘要
本文研究了利用紫外分光光度法测定河口水中硝酸盐氮的一种新方法,讨论了盐度的影响和其它干扰物质的影响及校正。方法在硝酸盐氮含量在0.1-4.0mg/L符合朗伯-比尔定律,满足河口水和近岸海水的硝酸盐氮含量范围的要求。标准曲线线性好,相关系数r达3个9以上。相对标准偏差在0.57- 4.03%。回收率为86.0-107.0%。并与国标方法(锌-镉法)进行了对比,数据结果有可比性。方法检出限为0.025mg/L。方法简便、快速、准确。
A new method of Measurement of Nitrate_Nitrogen in seawater with Ultraviolet Absorption was studied in this paper.The interaction factor and how to eliminated was discussed.Nitrate_Nitrogen concentration was in line with L-B theorem when it was between 0.1-4.0mg/L,Linear relation of standard curve was good ,coefficient of correlation r=0.999.The detection limit was 0.025mg/L.The recovery rate was between 86.0-107.0% The method had no significant differenceas compared with national standard test GB12763-1998...
