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GB/T 12688.10-2020: (Test methods of styrene for industrial use - Part 10: Determination of oxygenated compounds. Gas chromatography)
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| GB/T 12688.10-2020 | English | 129 |
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(Test methods of styrene for industrial use - Part 10: Determination of oxygenated compounds. Gas chromatography)
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GB/T 12688.10-2020
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Basic data | Standard ID | GB/T 12688.10-2020 (GB/T12688.10-2020) | | Description (Translated English) | (Test methods of styrene for industrial use - Part 10: Determination of oxygenated compounds. Gas chromatography) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G15 | | Word Count Estimation | 7,744 | | Date of Issue | 2020-11-19 | | Date of Implementation | 2021-10-01 | | Regulation (derived from) | National Standard Announcement No. 26 of 2020 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 12688.10-2020: (Test methods of styrene for industrial use - Part 10: Determination of oxygenated compounds. 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 methods of styrene for industrial use.Part 10.Determination of oxygenated compounds.Gas chromatography)
ICS 71.080.15
G16
National Standards of People's Republic of China
Test method of styrene for industrial use Part 10.
Determination of oxygenated compounds by gas chromatography
2020-11-19 released
2021-10-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
GB/T 12688 "Test Methods of Styrene for Industrial Use" is divided into the following parts.
---Part 1.Determination of purity and hydrocarbon impurities by gas chromatography;
---Part 3.Determination of polymer content;
---Part 4.Determination of peroxide content by titration;
---Part 5.Titration method for determination of total aldehyde content;
---Part 8.Determination of polymerization inhibitor (p-tert-butylcatechol) content spectrophotometric method;
---Part 9.Determination of trace benzene gas chromatography;
---Part 10.Determination of oxygenated compounds by gas chromatography.
This part is Part 10 of GB/T 12688.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
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).
Drafting organizations of this section. China Petroleum & Chemical Corporation Shanghai Research Institute of Petrochemical Industry, Shanghai SECCO Petrochemical Co., Ltd.
Company, Guangdong Xinhua Yuehuade Technology Co., Ltd., China Petroleum & Chemical Corporation Beijing Yanshan Branch.
The main drafters of this section. Peng Zhenlei, Liu Zhaoxia, Zhang Yuhong, Qiao Jianjun, Lu Tenglong, Cui Guanghong, Wang Chuan.
Test method of styrene for industrial use Part 10.
Determination of oxygenated compounds by gas chromatography
Warning --- This section is not intended to explain all safety issues related to its use. The user is responsible for taking appropriate safety and
Health measures to ensure compliance with relevant national laws and regulations.
1 Scope
This part of GB/T 12688 specifies benzaldehyde, phenylacetaldehyde, styrene oxide, acetophenone, phenol and p-tert-butyl in styrene for industrial use.
Gas chromatographic method for determining the content of oxygen-containing compounds such as catechol (TBC).
This section applies to benzaldehyde content in the range of 5mg/kg ~ 300mg/kg, phenylacetaldehyde, styrene oxide, acetophenone, phenol and
Determination of industrial styrene with oxygen-containing compounds such as TBC in the range of 1mg/kg to 100mg/kg.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document.
For undated references, the latest version (including all amendments) applies to this document.
GB/T 3723 General rules for the sampling safety of industrial chemical products
GB/T 6678 General Rules for Sampling of Chemical Products
GB/T 6680 General Rules for Sampling of Liquid Chemical Products
GB/T 8170 Numerical rounding rules and the expression and determination of limit values
3 Principles of the method
Inject an appropriate amount of sample into a gas chromatograph equipped with a capillary column and a flame ionization detector (FID), benzaldehyde, phenylacetaldehyde,
Oxygen-containing compounds such as styrene oxide, acetophenone, phenol and TBC and other components are effectively separated on the capillary column, and measured by FID
Quantify and record the peak area of oxygenated compounds, quantify by external standard method, and the results are expressed in milligrams per kilogram (mg/kg).
4 Reagents and materials
4.1 Carrier gas. nitrogen, with a purity of not less than 99.99% (volume fraction), dried and purified by silica gel and 5A molecular sieve.
4.2 Combustion gas. hydrogen, with a purity of not less than 99.99% (volume fraction), dried and purified by silica gel and 5A molecular sieve.
4.3 Combustion gas. air, oil-free, dried and purified by silica gel and 5A molecular sieve.
4.4 Standard reagents. benzaldehyde, phenylacetaldehyde, styrene oxide, acetophenone, phenol and p-tert-butylcatechol (TBC), each standard reagent is pure
The degree is not less than 99% (mass score). If the purity of the standard reagent does not meet the requirements, its content in the calibration mixture should be corrected.
4.5 High-purity p-xylene. purity not less than 99.999% (mass fraction). It can be prepared in the following manner.
Put a certain amount of p-xylene in an explosion-proof refrigerator at (-10±5)℃. When about 1/2~3/4 p-xylene crystallizes, take it out.
Pour out the liquid part, and the remaining crystal part is purified p-xylene. After the p-xylene crystals have melted, repeat this recrystallization operation until
Use gas chromatography to check that no target impurity peak appears.
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