GB 31604.22-2016 National Food Safety Standard - Food Contact Materials and Articles - Determination of Dichlorodifluoromethane in Products of Foamed Polystyrene (English Version)
1 Scope
This standard specifies the determination method of dichlorodifluoromethane in products of foamed polystyrene.
This standard is applicable to the determination of dichlorodifluoromethane in products of foamed polystyrene.
2 Principle
In accordance with relevant gas laws, put the specimen into a sealed equilibration flask and dissolve with solvent. Under certain temperature, dichlorodifluoromethane diffuses, when it reaches equilibrium, inject gas above solution into gas chromatograph for determination.
3 Reagents and Materials
Unless otherwise specified, analytically-pure reagents and Class-II water (defined in GB/T 6682) are adopted for the purpose of this method.
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Analysis Steps
6 Expression of Analysis Results
7 Accuracy
8 Other
Annex A Gas Chromatogram of Dichlorodifluoromethane Standard Solution
Standard
GB 31604.22-2016 National Food Safety Standard - Food Contact Materials and Articles - Determination of Dichlorodifluoromethane in Products of Foamed Polystyrene (English Version)
Standard No.
GB 31604.22-2016
Status
valid
Language
English
File Format
PDF
Word Count
2000 words
Price(USD)
40.0
Implemented on
2017-4-19
Delivery
via email in 1 business day
Detail of GB 31604.22-2016
Standard No.
GB 31604.22-2016
English Name
National Food Safety Standard - Food Contact Materials and Articles - Determination of Dichlorodifluoromethane in Products of Foamed Polystyrene
1 Scope
This standard specifies the determination method of dichlorodifluoromethane in products of foamed polystyrene.
This standard is applicable to the determination of dichlorodifluoromethane in products of foamed polystyrene.
2 Principle
In accordance with relevant gas laws, put the specimen into a sealed equilibration flask and dissolve with solvent. Under certain temperature, dichlorodifluoromethane diffuses, when it reaches equilibrium, inject gas above solution into gas chromatograph for determination.
3 Reagents and Materials
Unless otherwise specified, analytically-pure reagents and Class-II water (defined in GB/T 6682) are adopted for the purpose of this method.
Contents of GB 31604.22-2016
Foreword i
1 Scope
2 Principle
3 Reagents and Materials
4 Instruments and Apparatus
5 Analysis Steps
6 Expression of Analysis Results
7 Accuracy
8 Other
Annex A Gas Chromatogram of Dichlorodifluoromethane Standard Solution