中国渔业质量与标准2024，Vol.14Issue(3)：8-15,8.DOI:10.3969/j.issn.2095-1833.2024.03.002
钼酸铵分光光度法测定渔业水体中总磷含量的测量不确定度评定
Measurement uncertainty assessment of ammonium molybdate spectrophotometric determination of total phosphorus content in fishery water
摘要
Abstract
Total phosphorus,as one of the main indicators for evaluating water eutrophication,is an important detec-tion indicator for water quality monitoring in aquaculture processes.In order to determine the uncertainty of total phos-phorus content in fishery water bodies,the total phosphorus content in fishery water bodies was measured according to GB 11893-1989"Determination of total phosphorus in water quality-Ammonium molybdate spectrophotometric method",and the measurement uncertainty of total phosphorus content was evaluated according to JJF 1059.1-2012"Evaluation and Expression of Measurement Uncertainty".By establishing a measurement model,the main sources of uncertainty in the determination of total phosphorus by ammonium molybdate photometry can be divided into three cat-egories:uncertainty introduced by repeated sample measurements The uncertainty introduced by the sample in the process of determining phosphorus content(including the standard uncertainty introduced by the phosphorus standard storage solution,the uncertainty introduced by the phosphorus standard solution preparation process,the uncertainty introduced by the total phosphorus standard curve testing point moving process,the uncertainty introduced by the total phosphorus standard curve fitting,and the uncertainty introduced by the detection instrument in determining the total phosphorus precision),as well as the uncertainty introduced by the sample in sampling,digestion The uncertainty in-troduced by the constant volume process.The expanded uncertainty of total phosphorus content in the sample can be expressed as:C=(0.19±0.01)mg/L;k=2.[Chinese Fishery Quality and Standards,2024,14(3):08-15]关键词
总磷含量/钼酸铵分光光度法/渔业水体/测量不确定度/评定Key words
total phosphorus content/ammonium molybdate spectrophotometry/fishery water bodies/measurement uncertainty/assess分类
农业科技引用本文复制引用
刘祝萍,陈家长,宋超,裘丽萍,李丹丹,方龙香,范立民,孟顺龙..钼酸铵分光光度法测定渔业水体中总磷含量的测量不确定度评定[J].中国渔业质量与标准,2024,14(3):8-15,8.基金项目
国家特色淡水鱼产业技术体系(CARS-46) （CARS-46）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项(2023TD18) （2023TD18）
