流动注射-分光光度法测定水中铬的不确定度  

Uncertainty in determination of chromium in water by flow injection-spectrophotometry

作　　者：史小云 王素珍 

机构地区：[1]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《石化技术与应用》2011年第6期542-545,共4页Petrochemical Technology & Application

摘　　要：采用流动注射-分光光度法测定水中总铬质量浓度[ρ(Cr)]的不确定度,分析了测量过程中不确定度的来源,通过测量结果验证了相对不确定度的合理性。结果表明,该法的合成不确定度为0.006 5 mg/L,扩展不确定度为0.013 0 mg/L。Uncertainty of mass concentration of total chromium in water was determined by flow-injection spectrophotometry.The sources of uncertainty in the determination were analyzed.The relative uncertainty was proved to be reasonable by measurement results.The results showed that the standard uncertainty was 0.0065mg/L,the expanded uncertainty was 0.0130mg/L.

关 键 词：流动注射-分光光度法 总铬质量浓度 相对不确定度 

分 类 号：TQ014[化学工程]