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GB/T 38271-2019: Plastics - Determination of residual styrene monomer in polystyrene (PS) and impact-resistant polystyrene (PS-I) - Gas chromatography
Status: Valid
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| GB/T 38271-2019 | English | 279 |
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Plastics - Determination of residual styrene monomer in polystyrene (PS) and impact-resistant polystyrene (PS-I) - Gas chromatography
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GB/T 38271-2019
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PDF similar to GB/T 38271-2019
Basic data | Standard ID | GB/T 38271-2019 (GB/T38271-2019) | | Description (Translated English) | Plastics - Determination of residual styrene monomer in polystyrene (PS) and impact-resistant polystyrene (PS-I) - Gas chromatography | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G31 | | Classification of International Standard | 83.080.20 | | Word Count Estimation | 14,141 | | Date of Issue | 2019-12-10 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38271-2019: Plastics - Determination of residual styrene monomer in polystyrene (PS) and impact-resistant polystyrene (PS-I) - Gas chromatography
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Plastics--Determination of residual styrene monomer in polystyrene (PS) and impact-resistant polystyrene (PS-I)-Gas chromatography
ICS 83.080.20
G31
National Standards of People's Republic of China
Plastic polystyrene (PS) and impact-resistant polystyrene
Determination of residual styrene monomer content in (PS-I)
Gas chromatography
[ISO 2561..2012, Plastics-Determinationofresidualstyrenemonomer
2019-12-10 release 2020-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard uses the redrafting method to modify the use of ISO 2561..2012 "Plastic gas chromatography for determination of polystyrene (PS) and impact resistance
Content of residual styrene monomer in polystyrene (PS-I) ".
Compared with ISO 2561..2012, this standard has been adjusted in structure. Appendix A lists the standard and ISO 2561..2012.
List of chapter number comparison.
Compared with ISO 2561..2012, this standard has technical differences. Appendix B gives a list of technical differences and their causes.
This standard has made the following editorial changes.
--- In order to be consistent with the existing standard series, the standard name was changed to "plastic polystyrene (PS) and impact polystyrene (PS-I)
Determination of residual styrene monomer content in gas chromatography ";
--- Deleted the informational appendix A of ISO 2561..2012 about the model and corresponding operation of the instrument manufacturer, and only retained
The content of the gas chromatogram is taken as Appendix C of this standard;
--- Deleted the informative appendix B of ISO 2561..2012 "Method A and Method B under the typical conditions of the calibration solution of aromatic hydrocarbon quality
Correlation with the concentration of aromatic hydrocarbons in the sample solution ".
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Plastic Standardization Technical Committee (SAC/TC15).
This standard was drafted by. Petroleum and Chemical Research Institute of China National Petroleum Corporation, Beijing Yanshan Petrochemical High Technology Co., Ltd.
Company, Zhenjiang Chimei Chemical Co., Ltd., Yashi De Chemical (Jiangsu) Co., Ltd., Shanghai Secco Petrochemical Co., Ltd.
The main drafters of this standard. Wang Li, Zu Fenghua, Yi Jianjun, Zheng Huiqin, Tao Honghui, Qiu Jianfu, Dou Wanqiu, Hong Liuting, Yang Chunmei.
Plastic polystyrene (PS) and impact-resistant polystyrene
Determination of residual styrene monomer content in (PS-I)
Gas chromatography
1 Scope
This standard specifies the determination of residual styrene monomer content in polystyrene (PS) and impact polystyrene (PS-I) by gas chromatography
Three methods.
Method A-Dissolution method;
Method B --- dissolution-precipitation method;
Method C --- headspace method.
This standard is applicable to the determination of styrene monomer content in PS and PS-I, and is also applicable to the simultaneous determination of other volatility in PS and PS-I
Aromatic content.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 2035 Plastic Terms and Definitions (GB/T 2035-2008, ISO 472..1999, IDT)
GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values
GB/T 12806 Laboratory glass instrument single mark volumetric flask (GB/T 12806-2011, ISO 1042..1998, NEQ)
GB/T 12808 Laboratory glass instrument single mark pipette
3 Terms and definitions
The terms and definitions defined in GB/T 2035 apply to this document.
4 Principle
Dissolve the polymer sample in a solvent containing an internal standard and inject it into the gas chromatograph after sample processing to make styrene and other volatile
Aromatic hydrocarbons are separated and quantitatively determined. Method A. Inject a small amount of polymer solution directly into the gas chromatograph; Method B. Add the precipitant to the polymer
In the compound solution, the supernatant is injected into the gas chromatograph after the polymer is precipitated; Method C. The polymer solution is closed and heated until it reaches
At equilibrium, the upper gas is injected into the gas chromatograph. Method A is simple and has the same accuracy as Method B and Method C. However, Method A is being used
After a period of time, polymers and oligomers may contaminate the injector and cause erroneous results.
5 Reagents and materials
5.1 Internal standard
The internal standard should be selected according to the retention time of the substance contained in the polymer sample and the solvent, with a purity of not less than 99%. Suggest making
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