SN/T 3525-2013 English PDF

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SN/T 3525-2013: Determination of styrene in adhesives used in buiding for import and export. Gas chromatography-mass spectrometry
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 3525-2013	209	Add to Cart	3 days	Determination of styrene in adhesives used in buiding for import and export. Gas chromatography-mass spectrometry	Valid

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Basic data

Standard ID: SN/T 3525-2013 (SN/T3525-2013)
Description (Translated English): Determination of styrene in adhesives used in buiding for import and export. Gas chromatography-mass spectrometry
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: Q27
Classification of International Standard: 91.100.50
Word Count Estimation: 8,878
Regulation (derived from): AQSIQ notification issued in 2013 on the first batch of 179 entry-exit inspection and quarantine of industry standards; industry standard for filing Notice 2013 No. 9 (No. 165 overall)
Issuing agency(ies): General Administration of Customs
Summary: This standard specifies the import and export of construction adhesive styrene gas chromatography - mass spectrometry methods. This standard applies adhesive Determination of styrene in import and export of construction. Determination of the lower limit o

SN/T 3525-2013: Determination of styrene in adhesives used in buiding for import and export. Gas chromatography-mass spectrometry

---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 styrene in adhesives used in buiding for import and export.Gas chromatography-mass spectrometry People's Republic of China Entry-Exit Inspection and Quarantine Standards Determination of the import and export construction adhesive styrene Gas chromatography - mass spectrometry Issued on. 2013-03-01 2013-09-16 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 Guangdong CIQ. The main drafters of this standard. Li Dan, Lin Hongxiong, Spermato Huang Ziyi, Homocysteine on ZHOU Ming-hui, Liu Yingfeng, Di Cuiping, Zheng Jianguo. Determination of the import and export construction adhesive styrene Gas chromatography - mass spectrometry

1 Scope

This standard specifies the import and export construction adhesive styrene gas chromatography - mass spectrometry method. This standard applies adhesive styrene content measurement in construction and export. Determination of the lower limit of 25mg/kg. Principle 2 Using ethyl acetate or N, N- dimethylformamide was dissolved samples by gas chromatography - mass spectrometry performed. According to their retention time and Spectrum qualitative and quantitative internal standard.

3 Reagents

Unless otherwise indicated, the reagents used were of analytical grade. 3.1 ethyl acetate. purity ≥99.5%. 3.2 N, N- dimethylformamide (DMF). purity ≥99.5%. 3.3 Styrene (CAS Registry Number. 100-42-5). standard purity ≥99.5%. 3.4 n-undecane (internal standard, CAS Registry Number. 1120-21-4). purity ≥99%. 3.5 standard stock solution a. Accurately weigh styrene (3.3) 0.125g (accurate to 0.1mg), set 25mL volumetric flask, ethyl acetate (3.1) diluted to the mark, shake well. The concentration of 5g/L, may be at 0 ℃ ~ 4 ℃ sealed a month. 3.6 standard stock solution b. Accurately weigh styrene (3.3) 0.125g (accurate to 0.1mg), set 25mL volumetric flask with DMF (3.2) diluted to the mark, shake well. The concentration of 5g/L, may be at 0 ℃ ~ 4 ℃ sealed a month. 3.7 internal standard stock solution a. Weigh accurately undecane (3.4) 0.25g (precise to 0.1mg), set 50mL volumetric flask, with ethyl Ester (3.1) diluted to the mark, shake well. The concentration of 5g/L, may be at 0 ℃ ~ 4 ℃ sealed a month. 3.8 internal standard stock solution b. Weigh accurately undecane (3.4) 0.25g (precise to 0.1mg), a 50mL volumetric flask with DMF (3.2) diluted to the mark, shake well. The concentration of 5g/L, may be at 0 ℃ ~ 4 ℃ sealed a month. 3.9 standard solution a. accurate Pipette stock standard solution a (3.5) and internal standard stock solution a (3.7) each 1.00mL, placed 25mL capacity Bottle and diluted with ethyl acetate (3.1) to the mark, shake well. The solution of styrene and internal standard concentration was 200mg/L, available at At 0 ℃ ~ 4 ℃ sealed and stored for 1 week. 3.10 standard solution b. accurate Pipette stock standard solution b (3.6) and internal standard stock solution b (3.8) each 1.00mL, placed 25mL capacity Volumetric flask, and diluted with DMF (3.2) to the mark, shake well. The solution of styrene and internal standard concentration was 200mg/L, available at At 0 ℃ ~ 4 ℃ sealed and stored for 1 week.

4 instruments and equipment

4.1 Gas chromatography - mass spectrometry (GC-MS). with electron impact ionization (EI). 4.2 Balance. a sense of the amount of 0.1mg. 4.3 ultrasonic generator. rated power not less than 200W. 4.4 flask. 25mL, 50mL. ......

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