摘要
利用电导率仪测定土壤浸提液的离子浓度,通过对测定过程中各不确定度分量进行分析和合成,评定土壤电导率测定的不确定度。当土壤样品电导率均值为133.1μS/cm时,得到扩展不确定度为1.8μS/cm,取包含因子k=2,该样品的测定结果为(133.1±1.8)μS/cm。土壤电导率测定不确定度的主要来源是土壤浸提液的制备、电导率仪误差、电导率仪校准溶液、样品平行测定的重复性等。
To evaluate the uncertainty of soil extract, ion concentration in soil extract was measured by usingelectrical conductivity meter, and the subcomponents during the test process were analyzed and combined. When theaverage values of soil extract was 133. 1 μS / cm, the expanded uncertainty was 1. 8 μS / cm with the coverage factor k = 2.The result of the samples was （ 133. 1 ±1. 8 ） μS / cm. The major sources of measurement uncertainty came frompreparation for soil extract, indication error of electrical conductivity meter, standard solutions used for calibration ofconductivity meter, parallel determination repeatability for sample soil, etc.
作者
黄博珠
HUANG Bo-zhu(Guangdong Environmental Monitoring Center, Guangdong Guangzhou 510308, Chin)
出处
《广州化工》
CAS
2018年第15期132-133,共2页
GuangZhou Chemical Industry
基金
新增持久性有机污染物(POPs)检测技术研发与污染防控平台(No:2016A040403069)
关键词
土壤
电导率
不确定度评定
soil
electrical conductivity
uncertainty evaluation
