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| SN/T 4683-2016 | English | 239 |
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Determination of formamide in ethylene-vinyl acetate copolymer and its products - Gas chromatography-Mass method
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SN/T 4683-2016
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PDF similar to SN/T 4683-2016
Standard similar to SN/T 4683-2016 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
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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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