| 摘要: |
| 目的 规范和补充天然气用有机硫化合物加臭剂品质鉴定方法，解决单一气相色谱法定性不准确及定量不全面的技术问题。方法 应用气相色谱?质谱联用法对四氢噻吩加臭剂进行品种定性，分别采用质量平衡法、气相色谱法、卡尔·费休法、电感耦合等离子体质谱法（ICP-MS）测定了四氢噻吩加臭剂中有机化合物、水分及金属无机杂质的含量，计算得到四氢噻吩加臭剂纯度。结果 四氢噻吩定性分析谱图与标准谱图的匹配率达到96%以上，质量平衡法克服了由于化合物不同理化性质造成的响应值差异而无法准确测定主要成分含量的缺点，最终质量分数定量分析结果达到99.703%。结论 与标准品标称值相比较，质量平衡法的纯度定量结果更吻合，证明该方法准确可靠，可作为有机硫化合物加臭剂的品质鉴定方法。 |
| 关键词: 质量平衡法 加臭剂 四氢噻吩 有机硫化合物 品种定性分析 纯度定量分析 品质鉴定 |
| DOI：10.3969/j.issn.1007-3426.2025.02.018 |
| 分类号: |
| 基金项目:四川省科技计划项目“科技创新人才项目”（2024TDRC0003）；国家管网集团西气东输分公司“气质分析国产化设备性能评价项目”（GWHT20210041828） |
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| Quality identification method of odorant tetrahydrothiophene based on mass balance method |
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Chaofan SONG1, Sumin ZHANG2, Yan WU1, Haichuan LI1, Renhong LIU2, Zhiang LI2
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1.Pipe China West East Gas Pipeline Company, Shanghai, China;2.National Institute of Measurement and Testing Technology, Chengdu, Sichuan, China
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| Abstract: |
| Objective The study aims to standardize and enhance the quality identification method of organic sulfur compound odorant for natural gas and solve the technical problems of single gas chromatography with inaccuracies in qualitative determination and incomprehensiveness in quantitative determination. Method The qualitative analysis of tetrahydrothiophene odorant was conducted using gas chromatography-mass spectrometry (GC-MS). The content of organic compounds, moisture, and metal inorganic impurities in tetrahydrothiophene odorant were determined respectively by mass balance method combined with gas chromatography, Karl Fischer method and inductively coupled plasma mass spectrometry (ICP-MS), with the result that the purity of tetrahydrothiophene odorant was calculated. Result The match rate between the tetrahydrothiophene qualitative analysis spectrogram and the standard spectrogram was more than 96%. The mass balance method overcomes the disadvantage that the principal component content could not be accurately determined due to the difference of response values caused by different physicochemical properties of different substances, and the final purity quantitative analysis results reached 99.703%. Conclusion The quantitative results of purity are consistent with the nominal values of standard materials, which proves that the method is accurate and reliable, and can be used as a quality identification method for organic sulfur compounds odorant. |
| Key words: mass balance method odorant tetrahydrothiophene organic sulfur compound variety qualitative analysis purity quantification analysis quality identification |
