流动注射法同时测定水中的氮磷指标  

Flow injection analysis for simultaneous determination of nitrogen and phosphorus in water samples

作　　者：王如海[1,2] 钱薇[1] 朱小芳[2,3] 蒋倩[1] 王曦[1] 倪俊[1] 韩勇[1] 俞元春[2] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [2]南京林业大学森林资源与环境学院,南京210037 [3]南京市产品质量监督检验院,南京210028

出　　处：《分析试验室》2013年第12期32-36,共5页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金项目(31270664);土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)开放基金(Y052010006)资助

摘　　要：建立了流动分析仪同时测定水样中的氮磷指标（包括：铵态氮、亚硝态氮、硝态氮、总氮、磷酸盐、总磷）的方法。通过将一台进样器与两台流动分析仪进行整合和使用混合标准溶液配制标准曲线的改进，既使得分析所需样品量减少，又保证所有项目同时测定。测定环境标准样品均在保证值以内，对实际样品进行5个水平组的加标实验，加标回收率在96．3％～107．6％之间，相对标准偏差在0．54％～2．9％之间。方法可以广泛应用在环境监测领域中，大量快速分析水样中的氮磷指标，尤其适用于体积量少的水样分析。A continuous flow analyzer method was developed for the simultaneous determination of nitrogen and phosphorus in water samples, including ammonium nitrogen, nitrite, nitrate, total nitrogen, phosphate and total phosphorus. By integrating of a large auto sampler and two continuous flow analyzers and using mixed standard solutions for determination, the required amount of samples were reduced, and the simultaneous determination of the six indicators was also ensured. Measurement results of environmental reference materials were consistent with their certified values and uncertainty. Recoveries and relative standard deviations at five levels for spiked actual samples were 96. 3% - 107.6% and 0. 54% - 2. 9% , respectively. This method could be widely applied to the rapid analysis of nitrogen and phosphorus concentrations in large amounts of water samples in the field of environmental monitoring, especially for small volume of water sample.

关 键 词：连续流动分析仪 水样 氮 磷 

分 类 号：O657.3[理学—分析化学] O661.1[理学—化学]