天然气中硫化氢测定结果的精密度
邹伟
中国石化天然气分公司计量研究中心,武汉 430073
Precision of the determination of hydrogen sulfide in natural gas
邹伟
Measurement Research Center of Sinopec Natural Gas Company, Wuhan, 430073, China
摘要:依据GB/T 6683-1997 《石油产品试验方法精密度数据确定法》对天然气中硫化氢测定结果开展精密度研究。对亚甲蓝法、氧化微库仑法和气相色谱法测定天然气中硫化氢含量的重复性和再现性进行分析,结果表明,当天然气中硫化氢浓度为0~22 mg/m3时,置信区间为95%时的3种方法独立测定结果的重复性限r≤0.71,再现性限R≤6.48。该研究为测定结果的不确定度评定提供技术参考,研究结果优于现行国家标准,并建议开展国家标准的修订工作。
Abstract:According to GB/T 6683-1997 petroleum products test methods-determination of precision data, the precision of the determination results of hydrogen sulfide in natural gas is studied, especially the repeatability and reproducibility of methylene blue method, oxidative microcoulometry and gas chromatography for the determination of hydrogen sulfide in natural gas. The results show that when the concentration of hydrogen sulfide in natural gas is (0-22)mg/m3, in the 95% confidence interval, the repeatability limit r≤0.71 and the reproducibility limit R≤6.48 of the three methods.Compared with the current national standards, the results of this study are better than the national standards, and it is suggested to carry out the revision of national standards.
关键词:国家标准;硫化氢;精密度;重复性;再现性
Keywords:National standard; hydrogen sulfide precision; repeatability; reproducibility
本文引用格式:
邹伟.天然气中硫化氢测定结果的精密度[J].化学分析计量,2019,28(6):108-112.
ZOU W. Precision of the determination of hydrogen sulfide in natural gas[J]. Chemical analysis and meterage,2019,28(6):108-112.
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