微波高压消解-电感耦合等离子体发射光谱法测定城市污泥重金属含量的不确定度评定
Uncertainty evaluation for the determination of heavy metals content in municipal sludge by microwave high-pressure digestion-inductively coupled plasma
张珏1
作者信息
- 1. 广州市净水有限公司,广州 510000
- 折叠
摘要
目的 现行的标准尚未对微波消解程序进行明确描述,影响了不确定测量因素的系统分析.方法 采用微波高压消解-电感耦合等离子体发射光谱法(inductively coupled plasma,ICP)测定城市污泥的重金属含量,建立了城市污泥重金属测量的数学模型.结果 该方法分析中最大不确定度分量主要来源于ICP仪、含水率测量中的样品称量、标准曲线拟合 3 个方面.结论 提出了降低不确定度的对策与建议,为后续的测量准确性提供了技术依据.
Abstract
Objective The microwave digestion procedure was not clearly described in the previous standard,which affected the systematic analysis of measurement factors.Methods The heavy metals in municipal sludge was determined by the microwave high-pressure digestion-ICP.A mathematical model for heavy metals measurement in the municipal sludge was established.Results The main sources of uncertainty come from ICP instrument,sample weighing and calibration curve fitting.Conclusion Countermeasures and suggestions for reducing the uncertainty were introduced,which may provided technical basis for improving the accuracy of heavy metals measurement.
关键词
微波高压消解-ICP法/城市污泥/重金属/不确定度评定Key words
microwave high-pressure digestion-ICP/municipal sludge/uncertainty引用本文复制引用
出版年
2024
NETL
NSTL
万方数据