GB/T 32461-2015 Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings―High performance liquid chromatography (English Version)
Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings―High performance liquid chromatography
Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings - High performance liquid chromatography
1 Scope
This standard specifies the high performance liquid chromatography for determination of the formaldehyde in amino resins and phenolic resins used for packaging and of migration of formaldehyde in their moldings.
This standard is applicable to the determination of formaldehyde in amino resins and phenolic resins used for packaging and of migration of formaldehyde in their moldings. This standard may also serve as reference for the determination of migration of formaldehyde in paint films.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 5009.156 General principle for the determination of migration of packaging materials and their products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
3 Principle
The formaldehyde extract obtained by distillation or soaking of samples is subjected to derivatization reaction with 2,4-Dinitrophenylhydrazine (DNPH) to produce 2,4-dinitrophenylhydrazone. The content of formaldehyde is determined with high performance liquid chromatography (HPLC). The formula of reaction between formaldehyde and 2,4-Dinitrophenylhydrazine is as follows:
Reference spectrograms of 2,4-Dinitrophenylhydrazine and 2,4-dinitrophenylhydrazone are shown in Annex A.
4 Reagents and materials
Unless otherwise specified, all reagents used shall be analytically-pure reagents and water used shall be Class-I water defined in GB/T 6682.
4.1 Isopropanol.
4.2 Acetonitrile: chromatographically pure.
Foreword i
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 HPLC conditions (recommended)
7 Analytical procedure
8 Result calculation
9 Detection limit
10 Precision
Annex A (Informative) Chromatogram of standards
GB/T 32461-2015 Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings―High performance liquid chromatography (English Version)
Standard No.
GB/T 32461-2015
Status
valid
Language
English
File Format
PDF
Word Count
5500 words
Price(USD)
160.0
Implemented on
2016-7-1
Delivery
via email in 1 business day
Detail of GB/T 32461-2015
Standard No.
GB/T 32461-2015
English Name
Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings―High performance liquid chromatography
Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings - High performance liquid chromatography
1 Scope
This standard specifies the high performance liquid chromatography for determination of the formaldehyde in amino resins and phenolic resins used for packaging and of migration of formaldehyde in their moldings.
This standard is applicable to the determination of formaldehyde in amino resins and phenolic resins used for packaging and of migration of formaldehyde in their moldings. This standard may also serve as reference for the determination of migration of formaldehyde in paint films.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 601 Chemical reagent - Preparations of reference titration solutions
GB/T 5009.156 General principle for the determination of migration of packaging materials and their products
GB/T 6682 Water for analytical laboratory use - Specification and test methods
3 Principle
The formaldehyde extract obtained by distillation or soaking of samples is subjected to derivatization reaction with 2,4-Dinitrophenylhydrazine (DNPH) to produce 2,4-dinitrophenylhydrazone. The content of formaldehyde is determined with high performance liquid chromatography (HPLC). The formula of reaction between formaldehyde and 2,4-Dinitrophenylhydrazine is as follows:
Reference spectrograms of 2,4-Dinitrophenylhydrazine and 2,4-dinitrophenylhydrazone are shown in Annex A.
4 Reagents and materials
Unless otherwise specified, all reagents used shall be analytically-pure reagents and water used shall be Class-I water defined in GB/T 6682.
4.1 Isopropanol.
4.2 Acetonitrile: chromatographically pure.
Contents of GB/T 32461-2015
Foreword i
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 HPLC conditions (recommended)
7 Analytical procedure
8 Result calculation
9 Detection limit
10 Precision
Annex A (Informative) Chromatogram of standards
