1 Scope
This Standard specifies determination methods of respective contents and total content of the seven isocyanates including toluene-2,6-diisocyanate, diphenyl methane-4,4′- diisocyanate, toluene-2,4-diisocyanate, naphthalene-1,5-diisocyanate, benzyl isocyanate, hexamethylene diisocyanate and cyclohexyl isocyanate in plastics and their products for food contact materials and articles.
This Standard is applicable to determination methods of repective contents and total content of the seven isocyanates including toluene-2,6-diisocyanate, diphenyl methane-4,4′-diisocyanate, toluene-2,4-diisocyanate, naphthalene-1,5-diisocyanate, benzyl isocyanate, hexamethylene diisocyanate and cyclohexyl isocyanate in urethane plastics and their products.
2 Principle
Perform vibrating extraction on the isocyanate (in specimen) with dichloromethane, then carry out derivation reaction with 9-N-methylaminomethyl anthracene; separate the derivative with C18 liquid chromatogram columns, determine with fluorescence detector, and carry out the quantitative determination by external standard method.
3 Reagents and Materials
Unless otherwise specified, analytically-pure reagents and Class-I water (defined in GB/T 6682) are adopted for the purpose of this standard.
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 Chromatograph of Derivatives in Isocyanate Standard Solution
Standard
GB 31604.45-2016 National Food Safety Standard - Food Contact Materials and Articles -Determination of Isocyanate (English Version)
Standard No.
GB 31604.45-2016
Status
valid
Language
English
File Format
PDF
Word Count
3000 words
Price(USD)
60.0
Implemented on
2017-4-19
Delivery
via email in 1 business day
Detail of GB 31604.45-2016
Standard No.
GB 31604.45-2016
English Name
National Food Safety Standard - Food Contact Materials and Articles -Determination of Isocyanate
1 Scope
This Standard specifies determination methods of respective contents and total content of the seven isocyanates including toluene-2,6-diisocyanate, diphenyl methane-4,4′- diisocyanate, toluene-2,4-diisocyanate, naphthalene-1,5-diisocyanate, benzyl isocyanate, hexamethylene diisocyanate and cyclohexyl isocyanate in plastics and their products for food contact materials and articles.
This Standard is applicable to determination methods of repective contents and total content of the seven isocyanates including toluene-2,6-diisocyanate, diphenyl methane-4,4′-diisocyanate, toluene-2,4-diisocyanate, naphthalene-1,5-diisocyanate, benzyl isocyanate, hexamethylene diisocyanate and cyclohexyl isocyanate in urethane plastics and their products.
2 Principle
Perform vibrating extraction on the isocyanate (in specimen) with dichloromethane, then carry out derivation reaction with 9-N-methylaminomethyl anthracene; separate the derivative with C18 liquid chromatogram columns, determine with fluorescence detector, and carry out the quantitative determination by external standard method.
3 Reagents and Materials
Unless otherwise specified, analytically-pure reagents and Class-I water (defined in GB/T 6682) are adopted for the purpose of this standard.
Contents of GB 31604.45-2016
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 Chromatograph of Derivatives in Isocyanate Standard Solution