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GB/T 8038-2023: Coking toluene - Determination of hydrocarbon impurities - Gas chromatography
Status: Valid GB/T 8038: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 8038-2023 | English | 269 |
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Coking toluene - Determination of hydrocarbon impurities - Gas chromatography
| Valid |
GB/T 8038-2023
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| GB/T 8038-2009 | English | 319 |
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Toluene of coal carbonization -- Determination of hydrocarbon impurities gas chromatographic method
| Obsolete |
GB/T 8038-2009
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| GB/T 8038-1987 | English | 199 |
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Toluene of coal carbonization--Determination of hydrocarbon impurities-gas chromatographic method
| Obsolete |
GB/T 8038-1987
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PDF similar to GB/T 8038-2023
Basic data | Standard ID | GB/T 8038-2023 (GB/T8038-2023) | | Description (Translated English) | Coking toluene - Determination of hydrocarbon impurities - Gas chromatography | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G17 | | Classification of International Standard | 71.080.15 | | Word Count Estimation | 14,171 | | Date of Issue | 2023-09-07 | | Date of Implementation | 2024-04-01 | | Older Standard (superseded by this standard) | GB/T 8038-2009 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 8038-2023: Coking toluene - Determination of hydrocarbon impurities - Gas chromatography---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.
ICS 71.080.15
CCSG17
National Standards of People's Republic of China
Replace GB/T 8038-2009
Determination of hydrocarbon impurity content in coked toluene
gas chromatography
2024-01-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
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 replaces GB/T 8038-2009 "Gas Chromatography Method for Determination of Hydrocarbon Impurities in Coked Toluene" and is consistent with GB/T 8038-2009
In comparison, in addition to structural adjustments and editorial changes, the main technical content changes are as follows.
a) Changed the scope content (see Chapter 1, Chapter 1 of the.2009 edition);
b) The requirements for the stationary phase of the internal standard method have been changed (see 5.2.9.1, 5.4.1 of the.2009 edition);
c) The requirements for internal standard method chromatographic columns have been changed (see 5.3.1.5, 6.1.5 of the.2009 edition);
d) Added requirements for material nitrogen (see 5.3.2.3);
e) The standard sieve requirement is deleted (see 6.2.3 of the.2009 version);
f) The calculation formula of the correction factor has been changed (see 5.4.2.3, 7.4.3 of the.2009 version);
g) Increase the typical retention time of each component of FFAP (see Table 3 in 5.4.3.2);
h) Added area normalization method (see Chapter 6);
i) Changed precision requirements (see Chapter 7, Chapter 10 of the.2009 edition).
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is under the jurisdiction of the National Coal Chemical Standardization Technical Committee (SAC/TC469).
This document was drafted by. Jinneng Technology Co., Ltd., Baowu Carbon Technology Co., Ltd., Xingtai Xuyang Coal Chemical Co., Ltd.,
Metallurgical Industry Information Standards Research Institute, Chengde Qixin Environmental Technology Co., Ltd.
The main drafters of this document. Zhang Hui, Zhang Yingxin, Wang Jinxiao, Zhang Lili, Yin Tianchang, Zhang Jianshe, Lu Ziyi, Li Xianfang, Xue Zhongcai, Yang Xiaowei,
Hao Liping, Wang Xiaoyuan.
This document was first published in 1987, revised for the first time in.2009, and this is the second revision.
Determination of hydrocarbon impurity content in coked toluene
gas chromatography
1 Scope
This document specifies the sampling, principles, reagents, instruments and materials, preparations, and tests for the gas chromatographic determination of hydrocarbon impurities in coked toluene.
Test steps, result calculation, precision.
This document is applicable to the determination of hydrocarbon impurities in coked toluene, including benzene, C8 aromatics and non-aromatic hydrocarbons up to n-nonane. Internal standard method for each group
The measurement range (mass fraction) of impurities is 0.01%~0.03%; the measurement range (mass fraction) of each group of impurities by area normalization method is
0.002%~1.60%.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 1999 Sampling method for coked oil products
3 Terms and definitions
There are no terms or definitions to be defined in this document.
4 samples
According to the provisions of GB/T 1999, a representative sample of no less than 1000mL is randomly taken from a large amount of materials.
5 Method 1 Internal Standard Method
5.1 Principle
Add a known amount of internal standard substance to the sample, use a syringe to take a certain amount of the mixture and inject it into the vaporization chamber of the chromatograph, and the vaporized mixture is
The carrier gas is carried into the column chromatography, and each component flowing out is detected by a hydrogen flame ionization detector, and the chromatogram is recorded on the recorder.
The relative retention time of the impurity is used for qualitative identification, and the chromatographic peak area of the impurity relative to the internal standard is used for quantification.
The relative correction factors of the detector for each component should be taken into account when calculating.
5.2 Reagents
Unless otherwise stated, use only analytically pure reagents.
5.2.1 n-hexane. chromatographically pure (does not contain benzene, n-decane and ethylbenzene).
5.2.2 Internal standard substance. n-decane, purity not less than 99% (mass fraction).
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