GB/T 28727-2025 Gas analysis—Determination of the contents of trace sulfur compounds in gases—Gas chromatography with flame photometric detector

Scope

This document specifies the test conditions, reagents and materials, instrumentation, sampling, data processing, precision and measurement uncertainty, quality assurance and control, and requirements for test reports for the determination of trace sulfur compounds in gases by flame photometry gas chromatography. It describes the principle and steps of the test method. This document is applicable to the determination of various sulfur compounds, such as hydrogen sulfide, methanethiol, dimethyl sulfide, and carbon disulfide, and total sulfur content in gases. The total sulfur content (expressed as sulfur) is obtained by summing the concentrations of all sulfur compounds. The range of sulfur compound concentrations is (0.02–20) × 10-6 (mole fraction). For samples outside the measurement range, the analysis conditions can be modified or the samples can be diluted before measurement.

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