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SN/T 1545-2005 English PDF

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SN/T 1545-2005: Method for the concurrent determination of benzene, toluene, xylene and diisocyanate in solvent coatings for import and export. Gas chromatography method
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
SN/T 1545-2005	English	259	Add to Cart	3 days [Need to translate]	Method for the concurrent determination of benzene, toluene, xylene and diisocyanate in solvent coatings for import and export. Gas chromatography method	Valid	SN/T 1545-2005

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Basic data

Standard ID	SN/T 1545-2005 (SN/T1545-2005)
Description (Translated English)	Method for the concurrent determination of benzene, toluene, xylene and diisocyanate in solvent coatings for import and export. Gas chromatography method
Sector / Industry	Commodity Inspection Standard (Recommended)
Classification of Chinese Standard	G51
Classification of International Standard	87.040
Word Count Estimation	8,859
Date of Issue	2005-02-17
Date of Implementation	2005-07-01
Quoted Standard	GB/T 12589
Regulation (derived from)	Industry standard filing Notice 2005 No. 4 (No. 64 overall)
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China
Summary	This standard specifies the solvent-based coatings BTEX (benzene, toluene, xylene) and a diisocyanate monomer (toluene diisocyanate, the diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate) content by gas chromatography detection methods. This standard applies to solvent-based coatings BTEX diisocyanate monomer and determination.

SN/T 1545-2005: Method for the concurrent determination of benzene, toluene, xylene and diisocyanate in solvent coatings for import and export. Gas chromatography 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.
Method for the concurrent determination of benzene, toluene, xylene and diisocyanate in solvent coatings for import and export.Gas chromatography method Book of the People's Republic of China Entry and Exit Inspection and Quarantine Benzene and free diisocyanate in solvent-based coatings for import and export Simultaneous determination of acid ester monomers - Gas chromatography Released on.2005-02-17 2005-07-01 implementation People's Republic The General Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

Appendix A of this standard is an informative annex. This standard is proposed and managed by the National Certification and Accreditation Administration. This standard is drafted by. Shandong Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Niu Zengyuan, Xue Qiuhong, Fang Liping, Liu Xintong, Sun Zhongsong, Cai Fa, Wang Yingjie. This standard is the first industry standard for entry-exit inspection and quarantine. Benzene and free diisocyanate in solvent-based coatings for import and export Simultaneous determination of acid ester monomers - Gas chromatography

1 Scope

This standard specifies benzene series (benzene, toluene, xylene) and diisocyanate monomers (toluene diisocyanate, hexane) in solvent-based coatings. A method for the determination of the content of isocyanate, isophorone diisocyanate and diphenylmethane diisocyanate by gas chromatography. This standard applies to the determination of benzene series and diisocyanate monomers in solvent-based coatings.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study Is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard. GB/T 12589 Chemical reagent ethyl acetate

3 Principle

Filtered with an inert polytetrafluoroethylene (PTFE) membrane to remove most of the resinous film-forming materials, pigments, fillers and various micro-coatings in coating samples. Preparation of clean sample solution by granule aid; one-time analysis and determination of benzene, toluene, xylene, toluene diisocyanate (TDI) by capillary chromatography Various toxic and harmful components such as diisocyanate (HDI), isophorone diisocyanate (IPDI) and diphenylmethane diisocyanate (MDI), Standard method of quantification.

4 reagents and materials

Analytically pure reagents are used unless otherwise specified. 4.1 Molecular sieve. 5? (5 × 10-10m), strip shape. 4.2 Ethyl acetate. The ethyl acetate used to determine the diisocyanate monomer needs to be dehydrated and dehydrated by the following method, 250g molecular sieve (4.1) placed in a 500 ° C Ma Fu furnace for 2 h, until the furnace temperature drops below 100 ° C, and then placed in a desiccator equipped with anhydrous silica gel, cooled, Pour into 500 mL of ethyl acetate just opened, shake well, let stand for 24 h, then measure the water content according to the method specified in GB/T 12589 (mass fraction < 0.03%), alcohol content (mass fraction < 0.02%). 4.3 Benzene. 4.4 Toluene. 4.5 o-xylene. 4.6 m-xylene. 4.7 p-xylene. 4.8 Hexyl diisocyanate (HDI). purity (mass fraction) ≥ 99%. 4.9 Diphenylmethane diisocyanate (MDI). purity (mass fraction) ≥ 98%. 4.10 Isophorone diisocyanate (IPDI). purity (mass fraction) ≥ 95.0%, sum of isomers. 4.11 Toluene diisocyanate (TDI). mainly toluene-2,4-diisocyanate containing a small amount of toluene-2,6-diisocyanate, isomer And (mass fraction) ≥ 95.0%. 4.12 Internal standard. n-tetradecane, chromatographically pure. 4.13 Internal standard solution. accurately weigh n-tetradecane to a solution with a mass concentration of about 0.05g/mL, and dilute with ethyl acetate (4.2).

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