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SN/T 2554-2010: Determination of free formaldehyde in adhesives used in building for import and export
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Determination of free formaldehyde in adhesives used in building for import and export
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SN/T 2554-2010
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Basic data | Standard ID | SN/T 2554-2010 (SN/T2554-2010) | | Description (Translated English) | Determination of free formaldehyde in adhesives used in building for import and export | | Sector / Industry | Commodity Inspection Standard (Recommended) | | Classification of Chinese Standard | Q27 | | Classification of International Standard | 91.100.50 | | Word Count Estimation | 9,991 | | Date of Issue | 2010-05-27 | | Date of Implementation | 2010-12-01 | | Quoted Standard | GB 18583-2008 | | Regulation (derived from) | National Quality Inspection (2010) 290; industry standard filing Notice 2010 No. 10 (No. 130 overall) | | Issuing agency(ies) | General Administration of Customs | | Summary | This standard specifies the import and export of plastic used in construction of free formaldehyde by HPLC method, the method provides for import and export of building two free formaldehyde glue gas chromatographic method. This standard applies to import construction with plastic Determination of free formaldehyde. | SN/T 2554-2010: Determination of free formaldehyde in adhesives used in building for import and export
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Determination of free formaldehyde in adhesives used in building for import and export
People's Republic of China Entry-Exit Inspection and Quarantine Standards
Importers construction Determination of Formaldehyde glue free
importandexport
Issued on. 2010-05-27
2010-12-01 implementation
People's Republic of China
The State Administration of Quality Supervision, Inspection and Quarantine released
Foreword
This standard is proposed and managed by the National Certification and Accreditation Administration Committee.
This standard was drafted. Xiamen, People's Republic of China Exit Inspection and Quarantine.
The main drafters of this standard. Lai Ying, Cai Yanping, Wang Honghui, Dong Qing wood, Huang Changchun, Huangzong Ping Chen and show Zheng Li Chun, Sea.
This standard is the first release of the entry-exit inspection and quarantine industry standards.
Importers construction Determination of Formaldehyde glue free
1 Scope
This standard specifies a method of import and export construction glue free formaldehyde HPLC method, Method II provides access
Port building free of formaldehyde gas chromatographic method using glue.
This standard applies to import and export building measuring formaldehyde free glue.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB 18583-2008 interior decoration materials, adhesives harmful substances
A HPLC Method 3
3.1 Principle
Ultrasonic extraction of water samples free formaldehyde, extract with 2,4-dinitrophenylhydrazine derivatization occurs at 60 ℃, to form a stable 2,4-
Dinitrophenylhydrozones, after filtration, high performance liquid chromatography detection. According to their retention time qualitative, external standard.
3.2 Reagents and materials
Unless otherwise indicated, the reagents used were of analytical grade, water is deionized water or equivalent purity.
3.2.1 acetonitrile. chromatography.
3.2.2 2,4-dinitrophenylhydrazine (DNPH). AR, before use recrystallized from acetonitrile three times to remove the presence of formaldehyde -DNPH
Impurities.
3.2.3 0.3% dinitrophenylhydrazine solution. Weigh 0.75g2,4- dinitrophenylhydrazine (3.2.2) in 250mL flask, dissolved in acetonitrile
And to volume.
3.2.4 Formaldehyde standard solution (1mg/mL). commercially available, or press GB 18583-2008 Appendix A calibration use.
3.2.5 formaldehyde standard stock solution. accurately Pipette 2mL formaldehyde standard solution (3.2.4) in 200mL. Flask, dubbed the concentration of
10μg/mL of formaldehyde standard solution, this solution was left 0 ℃ ~ 4 ℃ can be stored in the refrigerator for a week.
3.2.6 Formaldehyde standard solution series. respectively Pipette 0,0.25mL, 0.50mL, 1.25mL, 2.50mL, 5.00mL,
10.00mL, 20.00mL formaldehyde stock solution (3.2.5) to eight 25mL volumetric flask, dilute to the mark, were dubbed the concentration
0,0.10μg/mL, 0.20μg/mL, 0.50μg/mL, 1.0μg/mL, 2.0μg/mL, 4.0μg/mL, 8.0μg/mL of the formaldehyde standard
Quasi working solution series.
3.3 instruments and equipment
3.3.1 High performance liquid chromatography with UV - visible detector.
3.3.2 ultrasonic cleaner (≥220W).
3.3.3 vortex mixer.
3.3.4 Centrifuge. 4000r/min.
3.3.5 Electronic balance. accurate to 0.1mg.
3.3.6 organic membranes. 0.45μm.
3.4 Analysis Steps
3.4.1 Extraction
He said sample after mixing learn about 1g (accurate to 0.0002g), with a stopper placed in 25mL colorimetric tube, diluted with water to the mark. In the swirling
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