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GB/T 39765-2021 English PDF

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US$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39765-2021: Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39765-2021	189	Add to Cart	3 days	Determination of benzene, methylbenzene, ethylbenzene, dimethybenzene in stationery - Gas chromatographic method	Valid

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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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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39765-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39765-2021_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 39765-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39765-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.