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Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 8038-2023: Coking toluene - Determination of hydrocarbon impurities - Gas chromatography Status: Valid GB/T 8038: Historical versions
Basic dataStandard 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71.080.15 Word Count Estimation: 14,171 Date of Issue: 2023-09-07 Date of Implementation: 2024-04-01 Older Standard (superseded by this standard): GB/T 8038-2009 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T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 ForewordThis 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 chromatography1 ScopeThis 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 documentsThe 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 products3 Terms and definitionsThere are no terms or definitions to be defined in this document.4 samplesAccording 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). ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 8038-2023_English be delivered?Answer: Upon your order, we will start to translate GB/T 8038-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. 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Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 8038-2023?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 8038-2023 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
