GB/T 40500-2021Determination of total aromatics composition in aviation fuels—Gas chromatography (English PDF)

Foreword

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

Introduction

The aromatic content in jet fuel has become an important quality indicator in jet fuel specifications. This document can determine aromatics in jet fuel The mass fraction or volume fraction. This data is useful for monitoring the process status of jet fuel production equipment, the development of new processes for jet fuel production and injection The quality control of gas and fuel is very important.

Compared with GB/T 11132, this document has fewer factors affecting the analysis results, simple test procedures, short analysis cycles, and is conducive to improvement. The test environment reduces labor intensity and improves the precision of analysis results.

Warning---The personnel using this document should have practical experience in formal laboratory work. The use of this document may involve certain dangerous This document does not point out all possible safety issues. The user is responsible for taking appropriate safety and health measures And ensure compliance with the conditions stipulated by relevant national laws and regulations.

1 Scope

This document describes a method for the determination of total aromatics in jet fuel using a gas chromatograph.

This document is applicable to the determination of total aromatics in jet fuel with a final boiling point below 300°C, and the range of determination of aromatics mass fraction or volume fraction The circumference is 0.5%~35%.

Note: The content of olefins in jet fuel is affected by its production process, and the content is low. The capture materials used in this document are reversible selective adsorption materials.

During the analysis process, the aromatic components are selectively adsorbed. If the sample contains olefins, olefins and aromatics co-elute, the determination result of aromatics will be too large.

This document is not applicable to the determination of the content of monomer hydrocarbon components in each hydrocarbon group.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

GB/T 4756 Manual sampling method for petroleum liquids

GB/T 6683 Petroleum products test method precision data determination method

GB/T 27867 Petroleum liquid pipeline automatic sampling method

3 Terms and definitions

The following terms and definitions apply to this document.

4 Principle and summary of the method

4.1 The analysis principle of gas chromatography for the determination of jet fuel hydrocarbon components is shown in Figure 1. After the jet fuel sample enters the chromatographic system, it passes through a […]