GB/T 40496-2021Determination of antioxidant content in jet fuel—High performance liquid 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.

1 Scope

This document describes the determination of 2,6-di-tert-butyl-p-cresol (T501) and 2,4-dimethyl-6-tert-butyl in jet fuel by high performance liquid chromatography Method of phenol content.

This document provides two methods. Method A (High Performance Liquid Chromatography-UV Detection) and Method B (Liquid Chromatography-Mass Spectrometry). Method A It is suitable for the determination of 2,6-di-tert-butyl-p-cresol (T501) and 2,4-dimethyl-6-tert-butylphenol in hydrocracking jet fuel.

The measuring range of 2,6-di-tert-butyl-p-cresol (T501) is 4.0mg/L~40.0mg/L, the determination of 2,4-dimethyl-6-tert-butylphenol content The range is 5.0mg/L~40.0mg/L; Method B is suitable for hydrocracking and hydrorefining 2,6-di-tert-butyl-p-cresol in jet fuel (T501) content determination, the determination range is 3.5mg/L~50.0mg/L.

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 6682 Analytical laboratory water specifications and test methods

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

GB/T 27867 Petroleum liquid pipeline automatic sampling method

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Method summary

The jet fuel sample is filtered through a filter membrane to remove particulate impurities, and then imported into high performance liquid chromatography for separation.

Method A is detected by ultraviolet detector or diode array detector, and method B is detected by mass detector. Method A sample 2,4- Dimethyl-6-tert-butylphenol and 2,6-di-tert-butyl-p-cresol (T501) content, method B sample contains 2,6-di-tert-butyl-p-cresol (T501) The quantities were quantified separately by the external standard method.

5 Instruments

5.1 High performance liquid chromatograph (HPLC): equipped with diode array detector or ultraviolet detector, the maximum allowable sample injection volume of the sample valve system […]