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SN/T 3802-2014: Determination of free diisocyanate esters in polyurethane adhesives used in building for import and export
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| SN/T 3802-2014 | English | 319 |
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Determination of free diisocyanate esters in polyurethane adhesives used in building for import and export
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SN/T 3802-2014
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Basic data | Standard ID | SN/T 3802-2014 (SN/T3802-2014) | | Description (Translated English) | Determination of free diisocyanate esters in polyurethane adhesives used in building for import and export | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | Q27 | | Classification of International Standard | 91.100.50 | | Word Count Estimation | 12,180 | | Regulation (derived from) | AQSIQ notification issued in 2014 on the first batch of 230 industry-standard entry-exit inspection and quarantine | | Issuing agency(ies) | General Administration of Customs | | Summary | This Standard specifies the import and export building a diisocyanate compound with a polyurethane adhesive free (1, 4-phenylene diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate, iso isophorone diisocyan | SN/T 3802-2014: Determination of free diisocyanate esters in polyurethane adhesives used in building for import and export
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(Import and export of construction diisocyanate compound with a polyurethane adhesive free - Determination)
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Importers construction polyurethane adhesive
Determination of free diisocyanate compound
Issued on. 2014-01-13
2014-08-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. People's Republic of China, Xiamen Entry-Exit Inspection and Quarantine Bureau Technology Center, Wenzhou People's Republic of China
Exit Inspection and Quarantine.
The main drafters of this standard. Lai Ying, Lin Rui, Huang Changchun, Han Chao, Ge Xiuxiu, Lin Weijing, Huanglong, Lin Haixia.
Importers construction polyurethane adhesive
Determination of free diisocyanate compound
1 Scope
This standard specifies the construction and export polyurethane adhesive free diisocyanate compound (1,4-phenylene diisocyanate, toluene
Diisocyanate, hexamethylene diisocyanate, trimethyl hexamethylene diisocyanate, isophorone diisocyanate, diphenyl methane diisocyanate
Ester) content by gas chromatography - mass spectrometry (GC-MS) and gas chromatography (GC). Wherein the gas chromatography - mass spectrometry for the arbitration law.
This standard applies to import and export building free polyurethane adhesive 1,4-phenylene diisocyanate, toluene diisocyanate, hexamethylene
Methyl diisocyanate, trimethyl hexamethylene diisocyanate, isophorone diisocyanate and diphenyl methane diisocyanate content
Determination.
Principle 2
The sample was dried by molecular sieves ultrasonic extraction with ethyl acetate. After the extract was filtered by gas chromatography - mass spectrometry and gas chromatography,
Internal standard.
3 Reagents and materials
Unless otherwise indicated, the reagents used were of analytical grade.
3.1 molecular sieves (0.5nm). 4h before firing at 500 ℃ using a muffle furnace, placed in a desiccator to cool for use.
3.2 ethyl acetate. 250g per 500mL added molecular sieve (3.1), place the filter after 24h.
3.3 diisocyanate compound Standard. See Appendix A in Table A.1.
3.4 tetradecane (n-Tetradecane, CAS No. 629-59-4). purity ≥98%.
3.5 internal standard stock solution. Weigh accurately 1.0g n-tetradecane (3.4) standard (accurate to 0.0001g) in 100mL flask with acetic acid
Ethyl ester (3.2) diluted to the mark, formulated at a concentration of 10mg/mL stock solution of the internal standard.
3.6 standard stock solution. Accurately weigh an adequate amount of diisocyanate compound standards, preparation of standard stock solution with ethyl acetate (3.2).
Standard stock solution should be stored away from light, and avoid contact with moisture in the air.
3.7 standard solution. Pipette appropriate amount of standard stock solution (3.6), adding an appropriate amount of internal standard stock solution (3.5), diluted with ethyl acetate (3.2) into
Applicable standard working solution concentration. Standard working solution should be stored away from light, and avoid contact with moisture in the air.
3.8 The organic phase filter. 0.22μm.
4 instruments and equipment
4.1 Gas chromatograph with mass detector.
4.2 Gas chromatograph equipped with a flame ionization detector.
4.3 vortex mixer.
4.4 ultrasonic cleaner (power ≥220W).
4.5 centrifuge. speed of not less than 4000r/min.
4.6 plug cuvette. 10mL.
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