摘要
根据测量不确定度评定与表示理论,采用二苯碳酰二肼分光光度法测定水中六价铬的测量不确定度,通过计算和评定,得出该法测定水中六价铬的测量结果为0.233mg/L时,取包含因子k=2(约95%置信概率),扩展不确定度U=0.007mg/L。该不确定度评价方法在实际工作中具有较强的实用价值。
According to uncertainty theory, the method uncertainty of analyzing Cr （VI） in water by 1,5 - diphenylcarbazide spectrophotometry was evaluated. The result shows that the extended uncertainty U = 0.007 mg/L, when the concentration of Cr（VI） is 0.233 mg/L, and the coverage factor k = 2（confidence probability is 95 % ） . This method is of practical value.
出处
《中国环境监测》
CAS
CSCD
北大核心
2008年第5期48-52,共5页
Environmental Monitoring in China
