环境保护科学2017，Vol.43Issue(6)：45-48,54,5.DOI:10.16803/j.cnki.issn.1004-6216.2017.06.009
淡水亚硝酸盐样品最佳保存条件的探讨
The Best Storage Conditions for Determination of Nitrite in Freshwater Samples
摘要
Abstract
Nitrite is a key important substance in the natural cycling of biological geochemistry but hard to save. In this study,--the effects of different pH conditions on NO2 concentration determination and different storage conditions on the NO2 concentration variation were discussed and the best storage conditions were identified. The results showed that the determined concentrations of--NO2 were lower when pH values of the samples were higher than 10, while the concentrations of No2were almost not affected when pH values were natural or acidic. Addition of HgCl2into the samples did not affect the measurement results. However, the -concentrations of NO2 dropped rapidly within a long-term storage when the samples were acidic (pH=2). Therefore, it was not-suitable for determination of NO2 under alkaline conditions and for storage under acidic conditions. When the field samples were- -collected, it was suggested that HgCl2 be immediately added for NO2storage and NO2concentrations be determined within 60 days.关键词
亚硝酸盐/pH,温度/保存时间Key words
Nitrite/pH/Temperature/Storage Time分类
资源环境引用本文复制引用
肖红伟,艾文强,肖化云,罗笠,郭威,孙启斌,黄启伟,曾梓琪..淡水亚硝酸盐样品最佳保存条件的探讨[J].环境保护科学,2017,43(6):45-48,54,5.基金项目
国家自然科学基金资助项目(41663003,41425014) （41663003,41425014）
东华理工大学校科技创新团队科研启动基金项目(DHKT2015101) （DHKT2015101）
东华理工大学博士科研启动基金项目(DHBK2015327) （DHBK2015327）
核资源与环境重点实验室自主基金(Z1609)资助 （Z1609）
