双光束紫外可见分光光度法测量氨不确定度拟合

摘要

Influence factors of the results spectrophotometric method of ammonia measurement in Nessler 's rea-gent for GBZ/T 160. 29-2004 are analyzed. The uncertainty of double beam UV visible spectrophotometry is fitted.相对扩展不确定度拟合公式为:The relative expanded uncertainty of the results of measurements meets following for-mula:C=6. 269 × 10 -5 × U3 -1. 181 × 10 -3 × U2 +1. 114 × 10 -2 × U-1. 321 × 10 -2 .%对GBZ/T 160.29-2004中氨的纳氏试剂分光光度法测量结果的影响因素进行了分析，并根据JJF1059-1999对双光束紫外可见分光光度法的不确定度进行了拟合。测量的结果的相对扩展不确定度拟合公式为：C=6.269×10-5× U3-1.181×10-3× U2+1.114×10-2× U-1.321×10-2。