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GB/T 25963-2022: Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters - High performance liquid chromatography method with refractive index detection
Status: Valid GB/T 25963: Evolution and historical versions
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| GB/T 25963-2022 | English | 349 |
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Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters - High performance liquid chromatography method with refractive index detection
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GB/T 25963-2022
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| GB/T 25963-2010 | English | 559 |
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Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters -- High performance liquid chromatography method with refractive index detection
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GB/T 25963-2010
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Basic data | Standard ID | GB/T 25963-2022 (GB/T25963-2022) | | Description (Translated English) | Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters - High performance liquid chromatography method with refractive index detection | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E31 | | Word Count Estimation | 18,111 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 25963-2022: Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters - High performance liquid chromatography method with refractive index detection
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Determination of aromatic hydrocarbon types in middle distillates containing fatty acid methyl esters - High performance liquid chromatography method with refractive index detection
ICS 75.160.20
CCSE31
National Standards of People's Republic of China
Replacing GB/T 25963-2010
Determination of aromatics content in middle distillates containing fatty acid methyl esters
Refractive Index Detector High Performance Liquid Chromatography
Published on 2022-10-12
2022-10-12 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration
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"
drafted.
This document replaces GB/T 25963-2010 "Determination of aromatic hydrocarbon content in middle distillates containing fatty acid methyl esters.
Compared with GB/T 25963-2010, in addition to structural adjustment and editorial changes, the main technical changes are as follows.
a) In the scope, the original determination step is defined as step A, and the determination step of high wax diesel is added and defined as step B (see
Chapter 1);
b) Changed the limit value of fatty acid methyl ester (FAME) in diesel fuel from "less than 5% by volume" to "not more than 5% by volume"
30%” (see Chapter 1, Chapter 1 of the.2010 edition);
c) Changed the summary of the method, modified the corresponding content according to the change of the measurement steps, and added the description of the backwash content (see
Chapter 4, Chapter 4 of the.2010 edition);
d) the chapter "Interference" was added (see Chapter 5);
e) Added requirements and recommendations for inertness of liquid chromatographs to fatty acid methyl esters (see 7.1);
f) Added recommended sample filter material (see 7.3);
g) Changed the requirements for the column system (see 7.4, 6.4 of the.2010 edition);
h) Changed the requirements for volumetric flasks (see 7.8, 6.8 of the.2010 edition);
i) Added requirements for sample storage conditions and methods before and after the test (see Chapter 8);
j) Changed the test procedure, and modified the original test procedure to include Step A, Step B and two common parts (see Chapter 11,
Chapter 10 of the.2010 edition);
k) Added typical high wax diesel sample chromatogram (see Figure 5);
l) Changed the general description in the precision chapter (see 14.1, 13.1 of the.2010 edition);
m) increased the precision of step B (see Table 3);
n) Added the description of backwash content (see Appendix A);
o) A practical guideline for the determination of high-wax diesel fuel has been added (see Appendix B).
Please note that some content of this document may be patented. The issuing agency of this document assumes no responsibility for identifying patents.
This document is proposed and managed by the National Standardization Technical Committee of Petroleum Products and Lubricants (SAC/TC280).
This document is drafted by. Sinopec Refining and Chemical Engineering (Group) Co., Ltd. Luoyang Technology R&D Center, China Petrochemical Corporation
Company Petrochemical Research Institute, China Petrochemical Corporation Luoyang Branch, Sinopec (Luoyang) Technology Co., Ltd.
The main drafters of this document. Wang Gan, Jia Ran, Song Chunxia, Bai Zhengwei, Li Yi, Li Xiang, Cui Lingyan, Liu Zelong, Wang Juan.
The previous versions of this document and its superseded documents are as follows.
---First published in.2010 as GB/T 25963-2010;
---This is the first revision.
Determination of aromatics content in middle distillates containing fatty acid methyl esters
Refractive Index Detector High Performance Liquid Chromatography
Caution - Persons using this document should have practical experience in formal laboratory work. The use of this document may involve certain dangerous
materials, equipment and operations, this document does not address all possible safety issues. It is the user's responsibility to take appropriate safety and health measures
and ensure compliance with the conditions stipulated by the relevant national laws and regulations.
1 Scope
This document describes a test method for the determination of aromatics content in middle distillates by high performance liquid chromatography with a refractive index detector.
This document is applicable to the determination of diesel fuel containing fatty acid methyl ester (FAME) not more than 30% by volume, fatty acid methyl ester (FAME) containing
Monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons in high-wax diesel oil with an integral fraction of not more than 7% and petroleum fractions with a distillation range of 150℃~400℃
content. The content of polycyclic aromatic hydrocarbons was obtained by summing the contents of bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons, and the total aromatic hydrocarbon content was determined by the sum of monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons.
The content of cyclic aromatic hydrocarbons is obtained by summation.
This document contains two steps. Step A and Step B. Step A is suitable for determining the volume fraction of fatty acid methyl esters (FAME) not greater than
The content of monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons in 30% diesel oil and petroleum fractions with a distillation range of 150 ℃ ~ 400 ℃, of which monocyclic aromatic hydrocarbons
Hydrocarbon content (mass fraction) is 6%~30%, bicyclic aromatic hydrocarbon content (mass fraction) is 1%~10%, tricyclic aromatic hydrocarbon content (mass fraction)
0%~2%, polycyclic aromatic hydrocarbon content (mass fraction) 1%~12%, total aromatic hydrocarbon content (mass fraction) 7%~42%. Step B is suitable
It is used to determine the content of aromatics in high-wax diesel oil with a volume fraction of fatty acid methyl esters (FAME) not greater than 7%. The total aromatics content (mass fraction) is
0.2%~2%.
NOTE. Typically, aromatic hydrocarbon types are defined based on their elution properties on a particular LC column compared to model compounds. Monocyclic aromatic hydrocarbons, bicyclic
The content of aromatics and tricyclic aromatics was quantified using the working curve of the external standard. In this document, one for each of monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons is used.
Aromatic compounds alone act as external standards, and these compounds may (may not be) representative of the aromatics present in the sample. Other methods for each aromatic
Definition and quantification of hydrocarbon types may differ from this method. For example, the refractive index of tetrahydronaphthalene is higher than that of o-xylene, and the refractive index of n-hexylbenzene is lower than that of o-xylene.
The differences in the contents of benzene, tetrahydronaphthalene and n-hexylbenzene in the samples may cause the quantitative results of monocyclic aromatic hydrocarbons in this method to be inconsistent with the actual situation.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations
documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to
this document.
GB/T 4756 Petroleum liquid manual sampling method
GB/T 12806-2011 Laboratory glass instrument single-line volumetric flask
GB 25199 B5 diesel
GB/T 27867 Petroleum liquid pipeline automatic sampling method
NB/SH/T 0843 Evaluation Statistical Techniques for Analytical Testing Systems in the Petrochemical Industry
3 Terms and Definitions
The following terms and definitions apply to this document.
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