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

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document supersedes GB/T 28727-2012 "Gas Analysis. Determination of Sulfides by Flame Photometric Gas Chromatography".

Compared with GB/T 28727-2012, apart from structural adjustments and editorial changes, the main technical changes are as follows.

— The scope of sulfide content determination and the method for total sulfur content determination have been changed (see Chapter 1, Chapter 1 of the 2012 edition);

— Definitions for five terms—"dry natural gas," "total sulfur," "total organic sulfur," "formal sulfur," and "coke oven gas"—have been removed. A new definition for "total sulfur content" has been added.

The definition of "quantity" (see Chapter 3 of the 2012 edition);

— The relationship between the sulfur compound content and the response value in the principle has been modified (see Chapter 4, Chapter 4 of the 2012 edition);

— Experimental conditions have been added (see Chapter 5);

— The requirements for carrier gas, fuel gas, combustion-supporting gas, and gaseous standard samples have been changed (see Chapter 6, Chapter 5 of the 2012 edition);

— The requirements for flame photometric gas chromatographs and columns have been changed (see Chapter 7, Chapter 6 of the 2012 edition);

— Added requirements for the gas path system (see 7.5);

— The sampling requirements have been changed (see Chapter 8, Chapter 7 in the 2012 edition);

— The experimental procedures have been changed (see Chapter 9, Chapter 8 in the 2012 edition);

— The requirements for processing experimental data have been changed (see Chapter 10, Chapter 9 in the 2012 edition);

— Requirements for precision and measurement uncertainty have been added (see Chapter 11);

— Requirements for quality assurance and control have been added (see Chapter 12);

— The requirements for the content of test reports have been changed (see Chapter 13, Chapter 10 of the 2012 edition).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Gas Standardization (SAC/TC206).

This document was drafted by: Institute of Chemistry, China Academy of Testing Technology; Southwest Branch of Haohua Gas Co., Ltd.; and Jincheng Comprehensive Inspection Center.

Testing and Inspection Center, Henan Provincial Institute of Metrology and Testing, Suzhou Huace Testing Technology Co., Ltd., Zhejiang Shaxing Technology Co., Ltd.

Southwest Chemical Research and Design Institute Co., Ltd., Beijing PURE Analytical Instruments Co., Ltd., China Shipbuilding (Handan) PURE Special Gases Co., Ltd.

National Institute of Metrology, Shanghai Huaai Chromatography Analysis Technology Co., Ltd., Beijing Ruixinjie Environmental Protection Technology Co., Ltd., Shanghai Fanwei Instruments Equipment Co., Ltd., Dalian Date Gas Co., Ltd., Dalian Guangming Chemical Industry Gas Quality Monitoring Center Co., Ltd., Sichuan Zhongce Standard Materials Technology Co., Ltd., Shimadzu Enterprise Management (Shanghai) Co., Ltd., Agilent Technologies (China) Co., Ltd., Langxi Instruments (Shanghai) Co., Ltd., Guizhou Provincial Institute of Product Quality Inspection and Testing, China Jiliang University, Meishan Maike Online Equipment Co., Ltd., and Dalian Kerui Gas Co., Ltd.

The main drafters of this document are: Zhou Xin, Wang Kai, Zhang Sumin, Li Bo, Wang Qiang, Wang Hongsheng, Fang Hua, Zhang Yinghua, Shu Kewen, Zhang Jinjun, and Li Jingsheng.

Ji Zhenhong, Liu Yuexu, Chen Yali, Tang Xiamei, Chen Zhenghua, Lai Xiaofeng, Zhao Jie, He Bo, Tang Zhongwei, Ma Haomiao, Shu Hui, Sun Xiaoli, Tian Xiaomei Sun Jie, Gao Yingquan, Li Jianhao, Wang Xianjian, Yuan Jiaoyang, Zhang Jing, Yao Weimin, Xiang Caihong, Zhang Yishan, Lu Changmin, Cheng Huapeng.

The release history of this document and the document it replaces is as follows.

— First published in 2012 as GB/T 28727-2012;

— This is the first revision.

Gas analysis of trace sulfur compounds in gases Determination of content by flame photometry and gas chromatography Warning---Personnel using this document should have practical experience working in a formal laboratory. This document does not address all possible safety issues.

Users are responsible for taking appropriate safety and health measures and ensuring compliance with relevant national regulations.

1 Scope

This document specifies the test conditions, reagents and materials, and instruments for determining trace sulfur compounds in gases using flame photometric gas chromatography.

The requirements for equipment, sampling, test data processing, precision and measurement uncertainty, quality assurance and control, and test reports are described, along with the test methods.

The principle and experimental procedures.

This document applies to the determination of various sulfur compounds, including hydrogen sulfide, methanethiol, dimethyl sulfide, and carbon disulfide, and the total sulfur content in gases. Total sulfur The content (calculated as sulfur) is obtained by summing the contents of all sulfur compounds. The determination range for sulfur compound content is (0.02~20)x10-6.

(Mole fraction). For samples outside the measurement range, change the analytical conditions or dilute the sample before measurement.

2 Normative references

GB/T 3634.2

GB/T 4844

GB/T 4946

GB/T 8170

GB/T 8979

GB/T 14850

GB/T 43306

3 Terms and Definitions

The terms and definitions defined in GB/T 4946, GB/T 14850 and GB/T 43306, as well as the following terms and definitions, apply to this document.

4 Principles

Sulfur compounds generate excited-state S2* in a hydrogen-rich flame, which emits characteristic light in the 350 nm to 450 nm range when it returns to the ground state.

The spectrum shows a maximum peak at 394 nm. The content of sulfur compounds is determined by measuring the intensity of the emitted light using appropriate filters. (Sulfur) The reaction of the compound in a hydrogen-rich flame is as follows. RS 2O2->SO2 N CO2