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GB/T 38349-2019: Determination of N-methyl pyrrolidone in rubber shoes and sports footwear
Status: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 38349-2019 | English | 139 |
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Determination of N-methyl pyrrolidone in rubber shoes and sports footwear
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GB/T 38349-2019
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PDF similar to GB/T 38349-2019
Basic data | Standard ID | GB/T 38349-2019 (GB/T38349-2019) | | Description (Translated English) | Determination of N-methyl pyrrolidone in rubber shoes and sports footwear | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | Y78 | | Classification of International Standard | 61.060 | | Word Count Estimation | 7,762 | | Date of Issue | 2019-12-31 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 38349-2019: Determination of N-methyl pyrrolidone in rubber shoes and sports footwear---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 N-methyl pyrrolidone in rubber shoes and sports footwear
ICS 61.060
Y78
National Standards of People's Republic of China
Determination of N-methylpyrrolidone content in rubber shoes and sports shoes
2019-12-31 release
2020-11-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the National Rubber and Rubber Products Standardization Technical Committee (SAC/TC35).
This standard was drafted. Shanghai Institute of Quality Supervision and Inspection Technology, Fujian Huafeng Sports Goods Technology Co., Ltd., Xiamen Zhongxun De
Testing Technology Co., Ltd., Jordan Sports Co., Ltd., Guangzhou Bureau Veritas Technology Testing Co., Ltd., Ruian Dahu Shoes Co., Ltd.
Company, Taizhou Baolite Shoes Co., Ltd., Xiamen Ruideli Calibration Testing Technology Co., Ltd., Quanzhou Jinke Technology Testing Co., Ltd., Jinjiang
Municipal Quality Measurement Testing Institute.
The main drafters of this standard. Xu Chunshu, Du Yingying, Fang Huayu, Cai Zhijie, Li Haihong, Fei Guoping, Feng Weizhao, Zhang Zhilei, Chen Zhiguo,
Deng Qichen, Lu Peiqi, Li Tianyuan, Li Haiyan, Luo Xianfa, and Ma Yanhong.
Determination of N-methylpyrrolidone content in rubber shoes and sports shoes
Caution --- People using this standard should have practical experience in regular laboratory work. This standard does not address all possible security issues.
It is the responsibility of the user to take appropriate safety and health measures and ensure compliance with the conditions stipulated by relevant national laws and regulations.
1 Scope
This standard specifies the gas chromatography-mass spectrometry method for N-methylpyrrolidone in rubber shoes and sports shoes.
This standard applies to the determination of N-methylpyrrolidone in rubber, synthetic leather, artificial leather, textile materials, etc. in rubber shoes and sports shoes.
2 Principle of the method
The sample was ultrasonically extracted with methanol, and the extract was filtered through a filter membrane, and then measured by a gas chromatography-mass spectrometer (GC-MS).
Select ion for confirmation and external standard method for quantification.
3 Reagents and materials
3.1 Methanol. chromatographically pure.
3.2 N-methylpyrrolidone standard substance. CAS No. 872-50-4, purity ≥99%.
3.3 Glass sample bottle. 40mL, good sealing.
3.4 Disposable sterile syringe. 2mL.
3.5 Organic phase needle filter. pore size 0.22 μm.
3.6 N-methylpyrrolidone standard solution, 1000mg/L. Weigh accurately 10mg of N-methylpyrrolidone standard substance in a 10mL volume
In a measuring flask, dissolve with methanol (3.1) and make up to volume to obtain a standard solution of 1000 mg/L.
Note. This solution is packaged in a brown storage bottle and stored in a refrigerator at 0 ℃ ~ 4 ℃, protected from light, and the validity period is 12 months.
3.7 N-methylpyrrolidone standard stock solution, 20mg/L. Transfer 0.5mL N-methylpyrrolidone standard with a concentration of 1000mg/L
The quasi solution (3.6) to a 25 mL volumetric flask was made up to the mark with methanol (3.1) to obtain a standard stock solution of 20 mg/L.
Note. This solution is packaged in a brown storage bottle and stored in a refrigerator at 0 ℃ ~ 4 ℃, protected from light, and the validity period is 3 months.
3.8 N-methylpyrrolidone standard working solution. Take 5 10mL volumetric flasks and add 0.25mL, 0.5mL, 1.0mL,
2.5mL and 5mL N-methylpyrrolidone standard stock solution (3.7) with a concentration of 20mg/L, make up to the mark with methanol (3.1), get
To standard working solutions with concentrations of 0.5 mg/L, 1 mg/L, 2 mg/L, 5 mg/L, and 10 mg/L, respectively, and 20 mg/L of N-methyl
The pyrrolidone standard stock solution (3.7) constitutes six standard working solutions of different concentrations.
4 Instruments and equipment
4.1 Gas chromatograph-mass spectrometer (GC-MS). EI source.
4.2 Chromatographic column. capillary column (30m × 0.25mm × 0.25μm, DB-WAX column or equivalent).
4.3 Analytical balance. accuracy of 0.1mg.
4.4 Ultrasonic generator. equipped with a temperature controller, the power is not less than.200W.
4.5 Adjustable pipette. Volume adjustable, range 50μL ~.200μL,.200μL ~ 1000μL, 0mL ~ 5mL, 0mL ~ 10mL.
4.6 Volumetric flask. 10mL, 25mL.
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