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GB/T 21928-2008 English PDF (GBT21928-2008)

GB/T 21928-2008 English PDF (GBT21928-2008)

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GB/T 21928-2008: Determination of phthalate esters in food plastic packaging materials

This standard specifies the test method of gas chromatography - mass spectrometry (GC-MS) of phthalate esters substance-content in food plastic packaging materials. This standard is applicable to determination of phthalate esters (16 kinds, see Appendix A) substance-content in food plastic packaging materials. In this standard, the detection limit of each phthalate esters compounds is 0.05 mg/kg.
GB/T 21928-2008
GB
ICS 67.040
C 53
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Determination of phthalate esters
in food plastic packaging materials
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ISSUED ON. JUNE 3, 2008
IMPLEMENTED ON. DECEMBER 1, 2008
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration Committee.
Table of Contents
Preface ... 3
1 Scope ... 4
2 Principle ... 4
3 Reagents... 4
4 Instruments ... 5
5 Analysis steps ... 5
6 Calculation results ... 6
7 Precision ... 7
Appendix A ... 8
Appendix B ... 9
Appendix C ... 10
Appendix D ... 11
Preface
Appendixes A, B, C and D are informative.
This standard was proposed by China Standardization Institute.
This standard shall be under the jurisdiction of the National Food Safety Emergency Standardization Working Group.
Drafting organization of this standard. Beijing Haidian District Product Quality Supervision and Inspection Institute (National Food Quality Safety Supervision and Inspection Center). Main drafters of this standard. Li Wei, Chang Yuwen, Zhao Yuqi, Zhou Xiangjuan, Mu Tongna, Liu Yanqin, and Cao Hong.
Determination of phthalate esters
in food plastic packaging materials
1 Scope
This standard specifies the test method of gas chromatography - mass spectrometry (GC-MS) of phthalate esters substance-content in food plastic packaging materials. This standard is applicable to determination of phthalate esters (16 kinds, see Appendix A) substance-content in food plastic packaging materials.
In this standard, the detection limit of each phthalate esters compounds is 0.05 mg/kg. 2 Principle
After extracted and purified, the food plastic packaging materials is determined by gas chromatography - mass spectrometry instrument Adopt characteristics of selected ion monitoring scan mode (SIM). Use abundance of fragment for qualitative determination. And use standard sample quantitative ion external standard method for quantitative determination. 3 Reagents
Water used in the standard is all-glass re-distilled water. Reagents are chromatographic pure (or re-distilled analytical pure), stored in glass bottle.
3.1 N-hexane.
3.2 Acetone.
3.3 16 kinds of phthalate esters standard products. dimethyl phthalate (DMP), diethyl phthalate (DEP), 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), benzyl butyl phthalate (BBP), bis(2-n-butoxyethyl) phthalate (DBEP), dicyclohexyl phthalate (DCHP), bis(2-ethylhexyl) phthalate (DEHP), diphenyl phthalate, di-n-octyl phthalate (DNOP), dinonyl phthalate (DNP). The purity is shown in Appendix B.
3.4 Standard stock solution. Respectively weigh above standard products (accurate to 0.1 mg). Use n-hexane to prepare 1 000 mg/L of stock solution. Store at 4 ??C in refrigerator. 3.5 Standard use solution. Use n-hexane to dilute the standard stock solutions to be standard series solutions with concentrations of 0.5, 1.0, 2.0, 4.0, 8.0 mg/L respectively. Keep for spare Appendix D
(Informative)
Gas chromatography - mass spectrometry selected ion chromatograms of
phthalate esters compounds standard substances
Note. The sequence of peaks of 16 kinds of phthalate esters is. dimethyl phthalate (DMP), diethyl phthalate (DEP), 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), benzyl butyl phthalate (BBP), bis(2-n-butoxyethyl) phthalate (DBEP), dicyclohexyl phthalate (DCHP), bis(2-ethylhexyl) phthalate (DEHP), diphenyl phthalate, di-n-octyl phthalate (DNOP), dinonyl phthalate (DNP).
Figure D.1 Gas chromatography - mass spectrometry selected ion
chromatograms of phthalate esters compounds standard substances
Abundance

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