基准邻苯二甲酸氢钾标定NaOH标准溶液的不确定度评定  

UNCERTAINTY EVALUATION FOR CALIBRATION OF STANDARD SOLUTION CONCENTRATION OF SODIUM HYDROXIDE BY FIDUCIAL POTASSIUM HYDROGEN PHTHALATE

作　　者：钟岩[1] 初丽伟[1] 潘浦群[1] 王艳红[1] 

机构地区：[1]吉林农业大学,农业部参茸产品质量监督检验测试中心,长春130118

出　　处：《化学分析计量》2008年第2期7-9,共3页Chemical Analysis And Meterage

摘　　要：对实验室自配的1mol/LNaOH标准滴定溶液的浓度进行不确定度评定,建立不确定度评定程序和方法,并依据GB/T601-2002建立数学模型。确定了影响NaOH标准滴定溶液浓度的主要因素,归纳了不确定度的主要来源,建立了用基准试剂标定标准滴定溶液浓度的不确定度评定程序和方法。当NaOH标准滴定溶液浓度为1.0201mol/L时,扩展不确定度为0.0040mol/L。该程序和方法适用于同类型实验的不确定度评定。Uncertainty for 1 mol/L standard solution concentration of sodium hydroxide prepared in the laboratory was evaluated. The procedure and method to evaluate the uncertainty were established. Based on GB/T 601 -2002, the mathematical model synthesizing uncertainty were established. The primary factors influencing the concentration of sodium hydroxide titrating solution were confirmed. The main origin of the evaluation uncertainty with the fiducial reagent to calibrate the concentration of standard solution were found. When the concentration of sodium hydroxide standard solution was 1. 020 1 mol/L, the expanded uncertainty was 0. 004 0 mol/L. The procedure and method of evaluation are useful to uncertainty evaluation in the similar experiments.

关 键 词：NaOH标准溶液 标定 不确定度 评定 

分 类 号：TQ424.1[化学工程] TH811[机械工程—仪器科学与技术]