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GB/T 25267-2010 English PDF

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GB/T 25267-2010: Determination of DDT in coatings
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Basic data

Standard ID GB/T 25267-2010 (GB/T25267-2010)
Description (Translated English) Determination of DDT in coatings
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard G50
Classification of International Standard 87.040
Word Count Estimation 13,123
Date of Issue 2010-09-26
Date of Implementation 2011-08-01
Quoted Standard GB/T 3186; GB/T 6682
Regulation (derived from) Announcement of Newly Approved National Standards No. 6 of 2010 (total 161)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the coating of DDT (DDT) content determination method, This standard applies to all types of coatings DDT (DDT) to the determination of DDT (DDT) related information, see Appendix A, gas chromatography detection limit: in sample volume is 2g, final volume of 2mL, the injection volume was l��L when, p, p "-DDE, o, p"-DDT, DDT "-DDD (TDE), p, p"-DDT (DDT) were 4. 0��g/kg, 4. 0, ��g/kg, 8. 0��g/kg, 10. 0��g/kg, gas chromatography mass spectrometry detection limit: the sampling volume 2g, final volume of 2mL, when the injection volume was 1��L, p, p "DDE, o, p"-DDT, P, p "-DDD (TDE), p, p"-DDT (DDT) were 2. 0��txg/kg, 2. 5��g/kg, 3. 0��g/kg, 2. 5��g/kg,

GB/T 25267-2010: Determination of DDT in coatings

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Determination of DDT in coatings ICS 87.040 G50 National Standards of People's Republic of China Determination of coating DDT (DDT) Content Issued on. 2010-09-26 2011-08-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard Annex A, Annex B and Annex C is informative appendix. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Standardization Technical Committee paint pigment (SAC/TC5) centralized. This standard was drafted. the Guangdong Provincial Quality Supervision and Inspection Center (National Paint Quality Supervision and Inspection Center (Guangdong)), CNOOC Changzhou coating Chemical Research Institute, Shunde Yung Gui Wanshun Industrial Co., Ltd., Guangdong Carpoly Chemical Co., marine chemical research Study hospital. The main drafters of this standard. Liu Tang book, Huang Ning, Li Jun, Chen Jiwen, Liang Jinhua, Wang on behalf of the people, the money leaves seedlings. Determination of coating DDT (DDT) Content Warning. Use of this standard shall have a person experiences regular laboratory work. This standard does not point out all possible security issues. Users have the responsibility to take appropriate safety and health practices and to ensure compliance with the conditions relevant national regulations.

1 Scope

This standard specifies the method for determination of coating DDT (DDT) content. This standard applies to all types of coatings DDT (DDT) Determination of DDT (DDT) information in Appendix A. GC detection limit. sampling volume 2g, final volume of 2mL, when the injection volume 1μL, p, p'-DDE, o, p'- DDT, p, p'-DDD (TDE), p, p'-DDT (DDT) were 4.0μg/kg, 4.0μg/kg, 8.0μg/kg, 10.0μg/kg. Gas chromatography - mass spectrometry detection limit. The sample size is 2g, final volume of 2mL, the injection volume was 1μL time, p, p'-DDE, o, p'-DDT, p, p'-DDD (TDE), p, p'-DDT (DDT) were 2.0μg/kg, 2.5μg/kg, 3.0μg/kg, 2.5μg/kg.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling (GB/T 3186-2006, ISO 15528.2000, IDT) GB/T 6682 analytical laboratory use specifications and test methods (GB/T 6682-2008, ISO 3696. 1987, MOD)

3 Sampling

According to the provisions of GB/T 3186 sampling. The first gas chromatography method

4 principle of the method

Law acetone and n-hexane solvent extraction samples purified nitrogen flow, fixed directly into the gas chromatograph after volume, electron capture detector (ECD) is detected, other than the standard method.

5 Reagents and materials

Unless otherwise specified, this standard reagents used were HPLC grade water should be consistent with GB/T 6682 a water requirements. The organic solvent is purified by chromatography Verify that no interference exists before use substances. 5.1 n-hexane. 5.2 acetone. 5.3 Extract. n-hexane - acetone mixed solvent (volume ratio 22.3). 5.4 phosphoric acid. AR. 5.5 anhydrous sodium. AR. 500 ℃ drying 4h, in a high temperature oven cooled to about 200 ℃, into the dryer to cool after sealing spare. 5.6 cotton. soak with acetone after 30min, then hexane decanted acetone soak 30min, discard the hexane dry spare. 5.7 Chromatography standard sample. p, p'-DDE, o, p'-DDT, p, p'-DDD (TDE), p, p'-DDT (DDT), a purity of at least 99% (Mass fraction), or a standard solution of known concentration. 5.8 Carrier gas. high purity nitrogen purity of at least 99.99%.

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