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SN/T 4156-2015: Determination of divinyl benzene in the imported and exported polystyrene poke--Gas chromatography-mass spectrometry
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SN/T 4156-2015: Determination of divinyl benzene in the imported and exported polystyrene poke--Gas chromatography-mass spectrometry

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Determination of divinyl benzene in the imported and exported polystyrene poke - Gas chromatography-mass spectrometry ICS 83.080.01 Y20 People's Republic of China Entry - Exit Inspection and Quarantine Industry Standard Import and export polystyrene plastic bags of divinylbenzene Detection method Gas chromatography - mass spectrometry Determination of diivinylbenzeneintheimportedandexportedpolystyrene Released by.2015-02-09 2015-09-01 implementation People's Republic of China State Administration of Quality Supervision, Inspection and Quarantine issued

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and approved by the National Certification and Accreditation Administration Committee. The drafting unit of this standard. Shanghai Entry - Exit Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this standard. Zhou Yun, Ma Ming, Cheng Yixiao, Zhou Yuyan. Import and export polystyrene plastic bags of divinylbenzene Detection method Gas chromatography - mass spectrometry WARNING - Personnel using this standard should have certain laboratory qualification and experience. This standard does not indicate all possible security problem. It is the responsibility of the user to take appropriate safety and health precautions.

1 Scope

This standard specifies the method for the determination of divinylbenzene in polystyrene plastic bags for food packaging by gas chromatography-mass spectrometry (GC-MS). This standard applies to the determination of the total amount of divinylbenzene in polystyrene. The detection limit of this standard is 0.2mg/kg.

2 method summary

After the sample was crushed and dissolved in methylene chloride, methanol was added as a precipitant to precipitate the polymer, so that the divinylbenzene monomer was mixed with The chromatographic mass spectrometry (GC-MS) analysis was carried out by internal standard method.

3 reagents and materials

Unless otherwise specified, all reagents are of analytical grade. 3.1 dichloromethane. 3.2 Methanol. 3.3 divinylbenzene. purity ≥ 80%. 3.4 n-hexadecane. purity ≥ 98.5%. 3.5 divinylbenzene standard stock solution. accurately weighed the amount of divinyl benzene standard material (3.3) (accurate to 0.1mg), with dichloromethane (3.1) formulated as 10.0 mg/L standard stock solution 1). 1) due to the material synthesis process, can not get pure divinyl benzene, so the material is divinyl benzene and ethyl vinyl benzene mixture for the German MERCK company's product. According to regulations, the EU limit for divinylbenzene is actually the total content of divinylbenzene and ethyl vinyl benzene. 3.6 n-Hexadecane standard stock solution. accurately weighed the appropriate amount of n-hexadecane standard material (3.4) (accurate to 0.1mg), with dichloromethane (3.1) prepared into 10.0mg/L internal standard stock solution. 3.7 divinylbenzene standard solution. the use of divinyl benzene standard stock solution diluted to the required concentration. 3.8 n-Hexadecane standard solution. When used, dilute the n-hexadecane standard stock solution to the desired concentration.

4 instruments and equipment

4.1 Analysis of balance. the amount of 0.1mg. 4.2 scissors and cutting knife. 4.3 pipettes. 4.4 glass capacity bottle. 4.5 aluminum foil. ...