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GB/T 39765-2021: Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 39765-2021 | English | 189 |
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Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method
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GB/T 39765-2021
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Basic data | Standard ID | GB/T 39765-2021 (GB/T39765-2021) | | Description (Translated English) | Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y50 | | Word Count Estimation | 10,142 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 39765-2021: Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method
---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.
Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method
ICS 71.040.40
Y50
National Standards of People's Republic of China
Method for determination of benzene, toluene, ethylbenzene and xylene in stationery
Gas chromatography
Released on 2021-03-09
2021-10-01 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.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the China National Light Industry Council.
This standard is under the jurisdiction of the National Stationery Standardization Technical Committee (SAC/TC514).
Drafting organizations of this standard. National Quality Supervision and Inspection Center for Cultural and Educational Supplies, Shenzhen Qixin Group Co., Ltd., Ningbo Kangda Fine Arts
Group Co., Ltd., Guangbo Group Co., Ltd., Beifa Group Co., Ltd., China Testing and Certification Group Co., Ltd.,
Zhencai Stationery Co., Ltd.
The main drafters of this standard. Wang Yangding, Ma Ping, Yan Ji, Kang Hongbing, Zhu Qing, Qiu Guangjin, Long Shuiyun, Liu Wenqiu, Wu Fengqin.
Method for determination of benzene, toluene, ethylbenzene and xylene in stationery
Gas chromatography
1 Scope
This standard specifies the gas chromatography method for the determination of benzene, toluene, ethylbenzene and xylene content in stationery products.
This standard is applicable to the content of benzene, toluene, ethylbenzene and xylene in products such as altered stationery, writing stationery, painting paints, adhesive stationery, etc.
Determination.
This standard does not apply to product packaging.
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 article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
3 Principle
After the sample is prepared into a test sample, it is injected into the gas chromatograph. Benzene, toluene, ethylbenzene, xylene (o-xylene, m-xylene and p-xylene)
Benzene) is completely separated from the coexisting substances in the capillary chromatographic column, then measured with a hydrogen flame ionization detector and quantified with an external standard method.
4 Reagents and materials
Unless otherwise specified, the reagents used are all analytically pure, and the water is the first grade water specified in GB/T 6682.
4.1 Carrier gas
Nitrogen or helium, purity ≥99.995%.
4.2 Auxiliary gas (septum purge and makeup gas)
Nitrogen with the same properties as carrier gas.
4.3 Calibration compound
Compounds used for calibration, such as benzene, toluene, ethylbenzene, xylene (o-xylene, meta-xylene, and p-xylene); the purity is at least 99%
(Mass fraction) or known concentration.
4.4 Dilution solvent
The solvent used to dilute the sample does not contain any substances that interfere with the test. The purity is at least 99% (mass fraction) or known concentration.
Examples. solvent-based stationery uses ethyl acetate, n-hexane, acetone, etc.; water-based stationery uses methanol, acetonitrile, tetrahydrofuran, etc. Refer to Appendix A for solvent selection.
5 Equipment
5.1 Gas chromatograph
Equipped with a hydrogen flame ionization detector (FID).
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