Objective In response to the low accuracy of online detection of total sulfur content in natural gas, a research on online detection method based on gas chromatography-mass spectrometry (GC-MS) technology is carried out. Methods By designing an efficient online sampling method, continuous and stable collection of natural gas samples is achieved, ensuring the representativeness of the tested samples. At the same time, combining the high-resolution and strong qualitative capabilities of GC-MS, detection and analysis conditions for total sulfur content in natural gas are set, and corresponding result calculation algorithms are developed to ensure the accuracy and reliability of the detection results. Results The comparative experiments show that the detection results of the samples tested by the proposed method are highly consistent with the actual total sulfur content, and the deviation is very small. The specific numerical deviation is within$\pm {0.2}\mathrm{{mg}}/{\mathrm{m}}^{3}$, which is significantly smaller than that of the comparison method. Conclusion This method can not only accurately and quickly determine the total sulfur content in natural gas, but also significantly improve the detection accuracy compared with the existing methods, which can effectively meet the strict requirements of natural gas quality monitoring and environmental protection, and provide strong technical support for the online monitoring of total sulfur content in natural gas industry.

gas chromatography-mass spectrometry  /  total sulfur content  /  testing  /  online  /  natural gas