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.
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