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GB/T 33649-2017Determination of oxygenates and aniline compounds in motor gasoline—Gas chromatography (English PDF)

车用汽油中含氧化合物和苯胺类化合物的测定气相色谱法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 12, 2017

Implementation date

December 1, 2017

Scope

GB/T 33649-2017 is the English-translated version of 车用汽油中含氧化合物和苯胺类化合物的测定气相色谱法.

GB/T 33649-2017 is the Chinese standard "Determination of oxygenates and aniline compounds in motor gasoline—Gas chromatography". Its scope clause reads: This standard specifies the method of using gas chromatography to determine the content of oxygen compounds and aniline compounds in vehicle gasoline.

This standard applies to the determination of vehicle gasoline (including ethanol gasoline) in the dimethoxymethane (also known as methyl acetal), ethyl acetate, Esters, aniline, N-methyl aniline, o-methyl aniline, m-methyl aniline and p-methyl aniline; this standard can also be used in the determination of gasoline The content of the oxygen-containing compound component such as methyl tert-butyl ether and methanol.

The mass fraction of the components to be added is the methyl tert-butyl group Ether. 0.05% to 15%; methanol, sec-butyl acetate, dimethoxymethane, ethyl acetate and aniline.

0.05% to 10%; N-methyl aniline, Aniline, p-methylaniline and m-methylaniline. 0.01% to 10%. Note. This standard can qualitatively detect dimethyl carbonate, but does not contain quantitative determination of the content.

When necessary, this standard can also be used to determine the content of oxygen-containing compounds such as C2-C4 alcohols, ethyl tert-butyl ethers, t-amyl methyl ethers, This standard does not provide accurate data on these components.

The content of these oxygen-containing compounds can be determined according to the NB/SH/T 0663 method Determination. Automotive gasoline may contain trace amounts of acetone, butanone and other ketones do not interfere with the determination. Its clauses include normative reference documents; summary of methods.

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Document preview — GB/T 33649-2017

National Standard of the People's Republic of China

ICS: 75.160.20
Classification: E 31

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1 Scope
2 normative reference document
3 Summary of methods
4 reagents and materials
5 equipment
6 sampling
7 Instrument preparation
8 correction
9 Test Step
10 results calculated
11 precision
13 Test Report

1 Scope

This standard specifies the method of using gas chromatography to determine the content of oxygen compounds and aniline compounds in vehicle gasoline.

This standard applies to the determination of vehicle gasoline (including ethanol gasoline) in the dimethoxymethane (also known as methyl acetal), ethyl acetate,

Esters, aniline, N-methyl aniline, o-methyl aniline, m-methyl aniline and p-methyl aniline; this standard can also be used in the determination of gasoline

The content of the oxygen-containing compound component such as methyl tert-butyl ether and methanol. The mass fraction of the components to be added is the methyl tert-butyl group

Ether. 0.05% to 15%; methanol, sec-butyl acetate, dimethoxymethane, ethyl acetate and aniline. 0.05% to 10%; N-methyl aniline,

Aniline, p-methylaniline and m-methylaniline. 0.01% to 10%.

Note. This standard can qualitatively detect dimethyl carbonate, but does not contain quantitative determination of the content.

When necessary, this standard can also be used to determine the content of oxygen-containing compounds such as C2-C4 alcohols, ethyl tert-butyl ethers, t-amyl methyl ethers,

This standard does not provide accurate data on these components. The content of these oxygen-containing compounds can be determined according to the NB/SH/T 0663 method

Determination.

Automotive gasoline may contain trace amounts of acetone, butanone and other ketones do not interfere with the determination.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

Petroleum liquid manual sampling method GB/T 4756

Petroleum products - Test methods - Determination of precision data

Automatic sampling of oil and liquid pipelines GB/T Determination of alcohols and ethers in gasoline - Gas chromatographic method

3 Summary of methods

3.1

Import the test sample with the internal standard ethylene glycol dimethyl ether (or 2-hexanone) into a center cut with microplate flow control (Deansswitch) components and two capillary columns. The components first enter the non-polar column and are divided according to the boiling point sequence

The switching of the solenoid valve through the central cutting assembly only allows the components having a boiling point less than 2-hexanone to flow from the nonpolar column into the strong

Polar column, the remaining components directly through the detector detection. The components of the strong polar column are used to achieve the hydrocarbon composition on the column

The separation of oxygen - containing compounds was carried out by hydrogen flame ionization detector and quantified by internal standard method. Can be quantitatively detected gasoline fraction in the two (MTBE) contained in the sample, and the content of the other components such as methyl ethyl t-butyl ether (MTBE), methanol and the like

Oxygen content.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

NB/SH/T 0663

Similar standards

GB 1787-2026|GB 25199-2026|GB/T 37322-2026|GB/T 47373-2026|GB/T 47585-2026|GB 16663-2025

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