Objective The aim is to provide traceability for the measurement activities of natural gas deodorant to ensure the accuracy and reliability of the test results.Methods The reference material of tetrahydrothiophene in methane with the concentration of 1.00-20.00 μmol/mol was preparated by weighing method.The homogeneity and stability of the reference material were evaluated.The determination method of tetrahydrothiophene in methane with sulfur chemiluminescence detector gas chromatography(GC-SCD)was established based on the reference material.Results The relative extended uncertainty was 2％,k=2,and the number of the National Certified Reference Material was GBW(E)062460.The method which was developed to determine tetrahydrothiophene in methane by GC-SCD showed that it had good linearity in the range of 0-5.00 μmol/mol,a good linear relationship with the correlation coefficient r of 1.000,detection limit of the method was 0.03 μmol/mol,and the RSD was between 2.1％to 3.4％(n=7).Conclusion The method based on certified reference material by GC-SCD is accurate and reliable,which provides technical support for the measurement of tetrahydrothiophene in natural gas.
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