GB/T 12688.1-2019 English PDFUS$199.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 12688.1-2019: Test method of styrene for industrial use -- Part 1: Determination of purity and hydrocarbon impurities -- Gas chromatography Status: Valid GB/T 12688.1: Historical versions
Basic dataStandard ID: GB/T 12688.1-2019 (GB/T12688.1-2019)Description (Translated English): Test method of styrene for industrial use -- Part 1: Determination of purity and hydrocarbon impurities -- Gas chromatography Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G16 Classification of International Standard: 71.080.15 Word Count Estimation: 10,179 Date of Issue: 2019-06-04 Date of Implementation: 2020-05-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 12688.1-2019: Test method of styrene for industrial use -- Part 1: Determination of purity and 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. Test method of styrene for industrial use--Part 1. Determination of purity and hydrocarbon impurities--Gas chromatography ICS 71.080.15 G16 National Standards of People's Republic of China Replace GB/T 12688.1-2011 Industrial styrene test method Part 1. Determination of purity and hydrocarbon impurities Gas chromatography Testmethodofstyreneforindustrialuse-Part 1.Determinationof Published on.2019-06-04 2020-05-01 implementation State market supervision and administration China National Standardization Administration issued ForewordGB/T 12688 "Test method for industrial styrene" is divided into the following parts. --- Part 1. Determination of purity and hydrocarbon impurities - Gas chromatography; --- Part 3. Determination of polymer content; ---Part 4. Determination of peroxide content - Titration; ---Part 5. Determination of total aldehyde content - Titration; ---Part 8. Determination of the content of inhibitors (p-tert-butyl catechol) - Spectrophotometric method; ---Part 9. Determination of trace benzene by gas chromatography; --- Part 10 Determination of oxygenates - Gas chromatography. This part is the first part of GB/T 12688. This part is drafted in accordance with the rules given in GB/T 1.1-2009. Tests for industrial use of styrene - Part 1 . Determination of purity and hydrocarbon impurities Gas chromatography. In addition to the editorial changes in this section compared with GB/T 12688.1-2011, the main technical changes are as follows. --- Increased the type of measurable impurities and adjusted the measurement range (see 1.2, 4.2, Figure 1, Figure 2,.2011 edition of 1, 4.2, Figure 1, figure 2); --- Normative references have been added to GB/T 6678 (see Chapter 2, Chapter 2 of the.2011 edition); ---Modified the requirements of the gas chromatograph (see 5.1, 5.1 of the.2011 edition); ---Modified typical chromatographic operating conditions (see Table 1, Table 1 of the.2011 edition); --- Modified formula (1) [see formula (1),.2011 version of formula (1)]; --- Modified Figure 2 (see Figure 2, Figure 2 of the.2011 version); --- Increased the effective carbon number correction area normalization method and related content (see Chapter 9); --- Removed the external standard method and related content (Chapter 8 of the.2011 edition); --- Revised the repetitive limit and increased the reproducibility limit (see Chapter 11, Chapter 11 of the.2011 edition). This part was proposed by the China Petroleum and Chemical Industry Federation. This part is under the jurisdiction of the National Chemical Standardization Technical Committee (SAC/TC63). This section was drafted. China Petrochemical Co., Ltd. Beijing Yanshan Branch, China Petroleum & Chemical Corporation Shanghai Stone Oil Chemical Research Institute, Shanghai Secco Petrochemical Co., Ltd., Guangdong Xinhua Yuehuade Technology Co., Ltd. The main drafters of this section. Shi Yangyang, Cui Guanghong, Jiang Liancheng, Fan Chenliang, Liu Zhaoxia, Zeng Yuansen, Che Jinfeng, Wang Min, Cheng Hong, Qiao Jianjun. The previous versions of the standards replaced by this section are. ---GB/T 12688.1-1990, GB/T 12688.1-1998, GB/T 12688.1-2011. Industrial styrene test method Part 1. Determination of purity and hydrocarbon impurities Gas chromatography Caution - This section is not intended to describe all of the security issues associated with its use. The user is responsible for taking appropriate security and Health measures are guaranteed to comply with the relevant national regulations.1 ScopeThis part of GB/T 12688 specifies the purity of industrial styrene and gas chromatography for the determination of hydrocarbon impurities. This section applies to purity (mass fraction) of not less than 99%, hydrocarbon impurity concentration (mass fraction) ranging from 0.001% to 1.000% Determination of styrene. Note. Typical hydrocarbon impurities include. ethylbenzene, p-xylene, m-xylene, o-xylene, cumene, n-propylbenzene, m-ethylbenzene, p-toluene, propenylbenzene, α- Methylstyrene, m-methylstyrene, p-methylstyrene, phenylacetylene and other impurities.2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 3723 General rules for sampling safety of industrial chemical products General rules for sampling GB/T 6678 chemical products GB/T 6680 Liquid Chemical Product Sampling General GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values3 method summary3.1 Internal standard method Under the conditions specified in this section, an appropriate amount of the sample containing the internal standard is injected into a chromatograph equipped with a hydrogen flame ionization detector (FID). Styrene and hydrocarbon impurity components are effectively separated on the column, and the peak areas of all peaks except the styrene component are measured, and each is calculated by internal standard method. The content of hydrocarbon impurities. The total amount of hydrocarbon impurities was subtracted from 100.00 to calculate the purity of styrene. 3.2 Corrected area normalization method Under the conditions specified in this section, an appropriate amount of sample is injected into a chromatograph equipped with a hydrogen flame ionization detector (FID). Styrene and hydrocarbon The impurity-like components are effectively separated on the column, and the peak areas of all the peaks are measured to measure the corrected area normalization method or the effective carbon number correction surface. The product normalization method calculates the content of each component.4 reagents and materials4.1 Internal standard. n-heptane, toluene or other suitable compound, the purity should be greater than 99% (mass fraction). 4.2 Standard reagents. ethylbenzene, p-xylene, m-xylene, o-xylene, cumene, n-propylbenzene, m-ethylbenzene, p-ethylbenzene, propylene benzene, ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 12688.1-2019_English be delivered?Answer: Upon your order, we will start to translate GB/T 12688.1-2019_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 12688.1-2019_English with my colleagues?Answer: Yes. 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Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 12688.1-2019 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. |
