水中总磷的测定及不确定度评定  

Determination and Uncertainty Assessment of Total Phosphorus in Water

作　　者：陈一虎[1] 周伟 Chen Yihu;Zhou Wei(Suzhou Vocational University,Suzhou Jiangsu 215000,China;Suzhou Baixin Environmental Testing Engineering Technology Co.,Ltd.,Suzhou Jiangsu 215000,China)

机构地区：[1]苏州市职业大学,江苏苏州215000 [2]苏州市百信环境检测工程技术有限公司,江苏苏州215000

出　　处：《山西化工》2024年第4期63-64,75,共3页Shanxi Chemical Industry

摘　　要：目的:测量水样中总磷含量并进行评定。方法:采用钼酸铵分光光度法进行测定,通过测量的重复性、标准溶液的配制和标准曲线的拟合等分量对测量中影响水样总磷含量结果的不确定度因素进行评定。结果:水样中总磷质量浓度的扩展不确定度为0.027 mg/L,总磷质量浓度为0.350 mg/L±0.027 mg/L。结论:标准溶液配制引入的不确定度为影响不确定度的主要因素,水样单从总磷质量浓度来看为Ⅳ类水质。Objective:To measure the total phosphorus content in water samples and evaluate it.Method:The ammonium molybdate spectrophotometric method was used for determination,and the uncertainty factors affecting the total phosphorus content in water samples were evaluated through the repeatability of measurement,preparation of standard solution,and fitting of standard curve.Result:The expanded uncertainty of total phosphorus mass concentration in the water sample is 0.027 mg/L,and the total phosphorus mass concentration is 0.350 mg/L±0.027 mg/L.Conclusion:The uncertainty introduced by the preparation of standard solutions is the main factor affecting the uncertainty,and the water sample is classified as Class IV water quality based solely on the total phosphorus mass concentration.

关 键 词：总磷 不确定度 分光光度法 

分 类 号：O661[理学—分析化学]