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| Uncertainty Evaluation in Comparison of Ammonia Standard Gas by Spectrophotometry |
| XIAO An-shan,DING De-wu,CUI Tao,JIANG Su-xia,ZOU Bing |
| State Key Laboratory of Chemical Safety and Control, SINOPEC Qingdao Researching Institute of Safety Engineering, Qingdao, Shandong 266071, China |
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Abstract To study the repeatability and stability of ammonia standard gas produced by gravimetry, comparison of concentration by spectrophotometry is made and uncertainty of measurement is evaluated according to JJF1135—2005‘Evaluation of Uncertainty in Chemical Analysis Measurement’. The comparison result is (17.6 ±0.4)mg/m3,k=2 and it is consistent with the nominal value(17.6 mg/m3). The result shows that the comparison by spectrophotometry meets the requirement completely.
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［1］JJF1135—2005,化学分析测量不确定度评定［S］.
［2］JJF1059—1999,测量不确定度评定与表示［S］.
［3］中国实验室国家认可委员会．化学分析中不确定度的评估指南［M］．北京:中国计量出版社,2002.
［4］倪晓丽,纪洁.玉米粉中阿特拉津含量测量的不确定度评定［J］.计量学报,2009,30(3):280-284. |
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2011, Vol. 32 
