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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
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 32461-2015 | English | 239 |
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Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings -- High performance liquid chromatography
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GB/T 32461-2015
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Basic data | Standard ID | GB/T 32461-2015 (GB/T32461-2015) | | Description (Translated English) | Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings -- High performance liquid chromatography | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G32 | | Classification of International Standard | 83.140.01 | | Word Count Estimation | 11,154 | | Date of Issue | 2015-12-31 | | Date of Implementation | 2016-07-01 | | Quoted Standard | GB/T 601; GB/T 5009.156; GB/T 6682 | | Regulation (derived from) | State Standard Announcement 2015 No.43 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the determination of formaldehyde content in formaldehyde resin and phenolic resin in packing and the migration of formaldehyde in the molded product by high performance liquid chromatography (HPLC). This standard applies to the packaging of amino resin, phenolic resin formaldehyde content and its determination of formaldehyde in the migration. The migration amount of formaldehyde in the coating film can be measured with reference to use. | 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
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Determination of formaldehyde in amino resins and phenolic resins and of migration of formaldehyde in their moldings.High performance liquid chromatography
ICS 83.140.01
G32
National Standards of People's Republic of China
Amino resin, phenolic resin in formaldehyde content
And the amount of formaldehyde in its molded product
High performance liquid chromatography
2015-12-31 released
2016-07-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Management Committee released
Directory
Preface I
1 Scope 1
2 normative reference document 1
Principle 1
4 Reagents and Materials 1
5 instruments and equipment 2
6 Chromatography (HPLC) conditions (recommended) 3
7 Analysis Step 3
8 results calculated 3
9 detection limit 5
10 precision 5
Appendix A (informative) Standard Chromatogram Figure 6
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed and centralized by the National Standardization Technical Committee for Quality Assurance (SAC/TC374).
The main drafting unit of this standard. National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Guangzhou Quality Supervision and Inspection Research Institute.
The main drafters of this standard. Xi Shaofeng, Xie Yongping, Li Huiyong, Xie Wenjie, Tan Jianhua, Wang Jicai, Lai Hongjuan, Zhang can be winter,
Huang Jinchao, Zhang Hu Song, Shen Congwen, Jia Fang, Huang Guangchi.
Amino resin, phenolic resin in formaldehyde content
And the amount of formaldehyde in its molded product
High performance liquid chromatography
1 Scope
This standard specifies the use of amino resin for packaging, formaldehyde content in phenolic resin and the amount of formaldehyde in its molded product by high performance liquid chromatography
Method.
This standard applies to the packaging of amino resin, phenolic resin in formaldehyde content and the formation of formaldehyde in the determination of migration. Coating a
Determination of aldehyde migration can be used.
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
Preparation of standard titration solution for GB/T 601 chemical reagents
General rules for immersion test of packaging materials and their products for foodstuffs GB/T 5009.156
GB/T 6682 Analytical laboratory water specifications and test methods
3 principle
The samples were distilled or immersed in the formaldehyde extract, and 2,4-dinitrophenylhydrazine (2,4-dinitrophenylhydrazine, DNPH)
The derivatization reaction was carried out to produce 2,4-dinitrophenylhydrazone, and the content of formaldehyde was determined by high performance liquid chromatography. Formaldehyde and 2,4-dinitrophenylhydrazine
The reaction is as follows.
NHNH2
NO2
NO2
HCHO →
NHN CH2
NO2
NO2
H2O
The reference spectra of 2,4-dinitrophenylhydrazine and 2,4-dinitrobenzone are shown in Appendix A.
4 Reagents and Materials
Unless otherwise stated, all reagents are of analytical grade and water is a primary water specified in GB/T 6682.
4.1 isopropyl alcohol.
4.2 acetonitrile (chromatographic purity).
4.3 dinitrophenylhydrazine (DNPH).
4.4 concentrated phosphoric acid (85%).
4.5 1% dinitrophenylhydrazine (DNPH) solution. DNPH was first purified by recrystallization from 25% aqueous acetonitrile and the purified
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