| 碘量法分析天然气中H2S浓度的不确定度评定 |
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| 引用本文： | 王兴华,田英,宫兆波,关丹,倪丰平.碘量法分析天然气中H2S浓度的不确定度评定[J].石油与天然气化工,2016,45(4):78-83. |
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| 作者姓名： | 王兴华 田英 宫兆波 关丹 倪丰平 |
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| 作者单位： | 中国石油新疆油田分公司实验检测研究院,中国石油新疆油田分公司实验检测研究院,中国石油新疆油田分公司实验检测研究院,中国石油新疆油田分公司实验检测研究院,中国石油新疆油田分公司实验检测研究院 |
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| 摘 要： | 分析了应用碘量法测定天然气中H_2S浓度的不确定度的影响因素,得出测量不确定度的主要来源为硫代硫酸钠标准溶液标定、H_2S采样吸收、吸收液滴定以及重复测定4个部分。分析得出硫代硫酸钠标准溶液引入的相对不确定度为0.082%,H_2S采样吸收引入的相对不确定度为0.16%,吸收液滴定引入的不确定度为0.17%,重复测量引入的不确定度范围为0.71%~7.07%。当被测样品中的H_2S质量浓度为12.5mg/m3时,取置信度为95%,包含因子k=2,则其扩展不确定度U=7.08%。
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| 关 键 词： | 碘量法 H2S 天然气 不确定度 |
Uncertaintyevaluationofmeasuringhydrogensulfidecontentinnaturalgasbyiodometrictitrationmethod |
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| WangXinghu,TianYing,GongZaobo,GuanDan and NiFengping.Uncertaintyevaluationofmeasuringhydrogensulfidecontentinnaturalgasbyiodometrictitrationmethod[J].Chemical Engineering of Oil and Gas,2016,45(4):78-83. |
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| Authors: | WangXinghu TianYing GongZaobo GuanDan and NiFengping |
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| Affiliation: | ExperimentalDetectionResearchInstitute,PetroChinaXinjiangOilfieldCompany,
Karamay834000,China,ExperimentalDetectionResearchInstitute,PetroChinaXinjiangOilfieldCompany,
Karamay834000,China,ExperimentalDetectionResearchInstitute,PetroChinaXinjiangOilfieldCompany,
Karamay834000,China,ExperimentalDetectionResearchInstitute,PetroChinaXinjiangOilfieldCompany,
Karamay834000,China and ExperimentalDetectionResearchInstitute,PetroChinaXinjiangOilfieldCompany,
Karamay834000,China |
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| Abstract: | Abstract:Uncertaintiesoriginatingfrom the measurementof H2Scontentin naturalgasby
iodometrictitration method wereevaluated.Theuncertainties were mainly obtainedfrom four
sources:thecalibrationofsodiumthiosulfatestandardsolution,bubbleabsorptionmethodforH2S,
titratedanalysis ofabsorptionliquid andrepetitive measurement.From results ofuncertainty
analyses,theuncertaintyvaluesoffourfactorswere0.082%,0.16%,0.17% and0.71%~7.07%
respectively.WhentheconcentrationofH2Sinsamplewas12.5 mg/m3,thedesignedconfidence
levelwas95% andconveragefactor(k)was2,therelativeexpandeduncertainty (U )oftheH2S
concentrationwas7.08%. |
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| Keywords: | iodometrictitrationmethod H2S naturalgas uncertainty |
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