磷酸盐系列标准物质的研制

The development of CRM of phosphate series solution

本文介绍了供测定水和海水中活性磷酸盐含量的标准物质的研究程序。其中包括了标准物质的配制、均匀性和稳定性检验、分析方法和数据统计处理等。并采用离子色谱法和分光光度法进行定值，对制备浓度分别为０．４０、０．８０、１．６０、３．２０、４．８０μｍｏｌ／ｄｍ３的磷酸盐标准物质，其相对不稳定度分别为３％、２％、１％、１％、１％。稳定期为一年以上。

In this paper, the research procedure is described of CRM used for determining phosphate content in water and seawater, including the preparation of CRM, monitoring homogeneity and stability, analysis method and the statistical treatment of data, etc. And ion chromatography and spectrometry methods were adopted to certify value. The preparation densities of the CRM of phosphate series solution were 0. 40, 0. 80, 1. 60, 3. 20 and 4. 80μmol/dm3, respectively, and the relative uncertainties were 3%, 2%, 1 %, 1 % and 1 %, separatel. The stability period was over one year.