紫外分光光度计测定重铬酸钾透射比的不确定度评定  

Uncertainty analysis of potassium dichromate transmittance by UV-spectrophotometer

作　　者：于海波[1] 王海蔷[2] 王博[1] 刘树丹[1] 王丹[2] 佟瑶彩[1] 鞠伟华[1] 

机构地区：[1]中国石油吉林石化公司研究院,吉林吉林132021 [2]中国石油吉林石化公司乙二醇厂,吉林吉林132021

出　　处：《化工科技》2013年第2期39-42,共4页Science & Technology in Chemical Industry

摘　　要：依据《国家计量检定规程》JJG178-2007(紫外、可见、近红外分光光度计),通过对重铬酸钾标准物质的透射比的测定来核查紫外分光光度计UV2450在B段(340～900nm)的稳定性及可靠性,并进行不确定度的评定。结果表明重铬酸钾的浓度对于测试结果的准确性有着非常大的影响,通过计算合成标准不确定度uc,可以看出在影响重铬酸钾透射比的不确定度主要来源中,B类标准不确定度是主要的影响因素。According to the request of a relative regulation of the national regulation of metrological verification,JJG178-2007,we analyzed the stability and dependability of UV-spectrophotometer at 340 -900 nm by using the testing the potassium dichromate transmittance, and evaluated the uncertainty. The results showed that the concentration of potassium dichromate to test the accuracy of the results has a very big impact, through the calculation of combined standard uncertainty Uc, we can see that the class B standard uncertainty is the main influence factors in influencing potassium dichromate trans mittance of uncertainty in the main source.

关 键 词：紫外分光光度计 重铬酸钾 不确定度 

分 类 号：TQ014[化学工程]