海水基质活性磷酸盐标准物质研制  

Preparation of standard reference material for reactive phosphorus with seawater matrix

作　　者：张川[1,2] 于涛 于小焱[1,2] 朱勇 王丽芳[5] 张晓慧 ZHANG Chuan;YU Tao;YU Xiaoyan;ZHU Yong;WANG Lifang;ZHANG Xiaohui(National Center of Ocean Standards and Metrology,Tianjin 300112,China;Technology Innovation Center for Marine Metrology and Instruments Test,MNR,Tianjin 300112,China;Second Institute of Oceanography,MNR,Hangzhou 310012,China;Key Laboratory of Marine Ecosystem Dynamics,MNR,Hangzhou 310012,China;State Key Laboratory of Marine Environmental Science,Xiamen University,Xiamen 361102,China)

机构地区：[1]国家海洋标准计量中心,天津300112 [2]海洋计量检测技术创新中心,天津300112 [3]自然资源部第二海洋研究所,浙江杭州310012 [4]自然资源部海洋生态系统动力学重点实验室,浙江杭州310012 [5]厦门大学近海海洋环境科学国家重点实验室,福建厦门361102

出　　处：《海洋学研究》2023年第3期92-100,共9页Journal of Marine Sciences

基　　金：自然资源部计量检测及质量监督资助项目(121154000000190010)。

摘　　要：本研究以西太平洋表层海水为基质,制备了浓度为0.5~4.0μmol L的海水活性磷酸盐系列标准物质。通过对所研制的4批次样品进行均匀性、稳定性评估,确定样品性能良好。对基于磷钼蓝分光光度法的气泡间隔连续流动分析系统的反应和操作条件进行优化,优化后的方法检出限低至0.03μmol L。不同浓度样品的相对标准偏差为0.37%~2.45%(n=9);通过与国际已有有证标准物质比对,本研究方法测量误差小于0.05μmol L。经6家具有中国计量认证资质且具备海水磷酸盐检测能力的实验室联合定值,确定了该系列标准物质的标准值,并对定值结果的不确定度进行了分析评价,相对扩展不确定度为2%~10%。Based on Western Pacific surface seawater as matrix,a series of reactive phosphorus reference materials with the concentration of 0.5-4.0μmol L were prepared.By investigating the uniformity and stability of the 4 batches of samples,it was confirmed that the performance met the needs of requirements.For the determination of reactive phosphorus in aqueous sample,segmented continuous flow analysis system with UV detector was used.The experimental conditions were optimized,the limit of detection(LOD)of the method was 0.03μmol L,and the relative standard deviation(RSD)of 4 different concentration batches was 0.37%-2.45%.The reliability of the method was verified by testing a CRM.The error was not more than 0.05μmol L.The concentration standard value of the series of reference substances was determined by 6 laboratories,and the relative expended uncertainty of characterization was evaluated,which was 2%-10%.

关 键 词：海水基质 活性磷酸盐 标准物质 

分 类 号：P734.44[天文地球—海洋化学]