Standard No.:	GB 31604.30-2025
English Name:	National food safety standard - Food contact materials and products - Determination of phthalate esters and determination of migration
Chinese Name:	食品安全国家标准 食品接触材料及制品?邻苯二甲酸酯类化合物的测定和迁移量的测定
Professional Classification:	GB    National Standard
Issued by:	National Health Commission of the People's Republic of China, State Administration for Market Regulation
Issued on:	2025-03-16
Implemented on:	2025-9-16
Status:	to be valid
Superseding:	GB 31604.30-2016 National Food Safety Standard - Food Contact Materials and Articles - Determination of the Content and Migration of Phthalate Esters
Language:	English
File Format:	PDF
Word Count:	6500 words
Price(USD):	195.00
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GB 31604.30-2025 National food safety standard -Food contact materials and articles - Determination of phthalate esters and their migration amount



1 Scope



This standard specifies the determination methods for 19 phthalate esters in food contact materials and articles, including dimethyl phthalate (DMP), diethyl phthalate (DEP), diallyl phthalate (DAP), diisobutyl phthalate (DIBP), dibutyl phthalate (DBP), bis(2-methoxyethyl) phthalate (DMEP), bis(4-methyl-2-pentyl) phthalate (BMPP), bis(2-ethoxyethyl) phthalate (DEEP), dipentyl phthalate (DPP), dihexyl phthalate (DHXP), butylbenzylphthalate (BBP), bis(2-butoxyethyl) phthalate (DBEP), dicyclohexyl phthalate (DCHP), bis(2-ethylhexyl) phthalate (DEHP), diphenyl phthalate (DPhP), di-n-octyl phthalate (DNOP), dinonyl phthalate (DNP), diisononyl phthalate (DINP-1) and 1,2-benzenedicarboxylic acid, di-C8-10-branched alkyl esters, C9-rich (DINP-2), as well as diisodecyl phthalate (DIDP-1) and 1,2-benzenedicarboxylic acid, di-C9-11-branched alkyl esters, C10-rich (DIDP-2). It also specifies the methods for determining their migration amounts.



Part I "Determination of phthalate esters" is applicable to the determination of 19 phthalate esters in food contact materials and articles such as plastics, rubber, paints and coatings, and adhesives. Part II "Determination of migration amounts of phthalate esters" is applicable to the determination of migration amounts of 19 phthalate esters in food contact materials and articles.



Part I Determination of phthalate esters



2 Principle



Phthalate esters in food contact materials and articles are extracted using tetrahydrofuran as a solvent with ultrasonic assistance. For soluble specimens, polymers and other substances are precipitated with n-hexane, and the extract is subjected to centrifugal separation and concentration, and diluted to the scale before being analyzed by gas chromatography-mass spectrometry; for insoluble specimens, repeated extraction is performed with tetrahydrofuran, and the extract is subject to concentration and diluted to the scale before being analyzed by gas chromatography-mass spectrometry. The retention time and characteristic ions are used for qualitative analysis, and the external standard method is used for quantitative analysis.





3 Reagents and materials



Unless otherwise specified, all reagents used in this method shall be of chromatographic grade or analytical grade reagents verified by the blank test to show no phthalate esters under test. The water is Class-I water as specified in GB/T 6682. During the test process, the use of plastic utensils shall be avoided. Alternatively, plastic utensils verified by the blank test to show no phthalate esters under test may be used.



3.1 Reagents

Foreword i
1 Scope
2 Principle
3 Reagents and materials
4 Apparatus
5 Analytical procedures
6 Expression of analysis results
7 Precision
8 Others
9 Principle
10 Reagents and materials
11 Apparatus
12 Analytical procedures
13 Expression of analysis results
14 Precision
15 Others
Annex A Information on 19 phthalate esters
Annex B Quantitative and qualitative selective ion of 19 phthalate esters
Annex C Reference GC-MS chromatogram of standard solution of phthalate esters