SN/T 4683-2016 English PDF

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
SN/T 4683-2016	239	Add to Cart	3 days	Determination of formamide in ethylene-vinyl acetate copolymer and its products - Gas chromatography-Mass method	Obsolete

Similar standards

GB/T 5836.2   QB/T 2472   QB/T 2490   

Basic data

Standard ID: SN/T 4683-2016 (SN/T4683-2016)
Description (Translated English): Determination of formamide in ethylene-vinyl acetate copolymer and its products - Gas chromatography-Mass method
Sector / Industry: Commodity Inspection Standard (Recommended)
Classification of Chinese Standard: G33
Word Count Estimation: 6,640
Date of Issue: 2016-12-12
Date of Implementation: 2017-07-01
Regulation (derived from): State-Quality-Inspection-Accredidation (2016) No.590
Issuing agency(ies): General Administration of Customs

SN/T 4683-2016: Determination of formamide in ethylene-vinyl acetate copolymer and its products - Gas chromatography-Mass 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 formamide in ethylene-vinyl acetate copolymer and its products-Gas chromatography-Mass method People's Republic of China Exit Inspection and Quarantine standards Ethylene - vinyl acetate copolymer and its products, formamide Determination of gas chromatography - mass spectrometry 2016-12-12 released 2017-07-01 implementation People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine released Exit Inspection and Quarantine of People's Republic of China Industry Standard Ethylene - vinyl acetate copolymer and its products, formamide Determination of gas chromatography - mass spectrometry China Standard Press First edition of November.2017

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Certification and Accreditation Administration Committee. This standard was drafted by Fujian Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Cheng Qun, He Jianren, Huang Ping, Jiang Xiaoli, Fang Guangwei, Chen Shaohua, Tong Yugui, Lin Bi-fen, Lin Zhong. Ethylene - vinyl acetate copolymer and its products, formamide Determination of gas chromatography - mass spectrometry

1 Scope

This standard specifies the ethylene - vinyl acetate copolymer and its products formamide gas chromatography - mass spectrometry method. This standard applies to ethylene - vinyl acetate copolymer (referred to as EVA) and its products in the determination of formamide.

2 method summary

The residual formamide in the sample was extracted with methanol in a Soxhlet apparatus and detected by gas chromatography-mass spectrometry (GC-MSD) Qualitative detection with full scan, select the ion external standard quantitative.

3 Reagents and materials

Unless otherwise indicated, all reagents used are analytical grade or above purity reagents. 3.1 methanol. Chromatographic purity. 3.2 Formamide. Purity ≥98% (CAS No.75-12-7, Formula .HCONH2). 3.3 Standard stock solution Accurately weigh 0.1000g of formamide standard (3.2), dissolve the constant volume to 100mL volumetric flask with methanol (3.1) , Prepared into a concentration of 1000μg/mL standard stock solution, packed in brown bottles, 4 ℃ preservation, valid for 6 months. 3.4 Standard Working Solution The standard stock solution (3.3) is diluted stepwise with methanol (3.1) to a concentration of 1.0 μg/mL, 5.0 μg/mL, 10.0μg/mL, 20.0μg/mL, 50.0μg/mL, 100μg/mL standard working solution, stored at 4 ℃, valid for 3 months.

4 instruments and equipment

4.1 GC-MS with mass selective detector (MSD). 4.2 Analytical Balance. Sense of 0.1mg. 4.3 Rotary evaporator. 4.4 Soxhlet extraction device. 4.5 KD concentrated bottle .150 mL. 4.6 with centrifuge tube .10mL. 4.7 nylon filter (0.2μm). 4.8 disposable syringe .2mL.

5 test methods

5.1 Extraction To replace the representative sample, cut it to 2mm × 2mm below, mix. Weigh 0.2g (accurate to 0.0001g) sample, add Glass beads together with filter paper wrapped in Soxhlet extraction device, add 80mL of methanol (3.1) to the receiving bottle, so that all samples can be submerged ......

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