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GB/T 21928-2008 PDF English

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GB/T 21928-2008: Determination of phthalate esters in food plastic packaging materials
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GB/T 21928-200870 Add to Cart Auto, 9 seconds. Determination of phthalate esters in food plastic packaging materials Obsolete

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

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT21928-2008
GB ICS 67.040 C 53 NATIONAL STANDARD Determination of phthalate esters in food plastic packaging materials 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.

4 Instruments

4.1 Gas chromatography - mass spectrometry (GC-MS). 4.2 Analysis balances. Sensitivity of 0.1 mg and 0.01 g. 4.3 Ultrasonic generator.

5 Analysis steps

5.1 Sample treatment Pulverize the sample to fine particles of which the single particle ≤ 0.02 g. Mix well. Accurately weigh 0.2 g of (accurate to 0.1 mg). 5.2 Blank test The reagent used in the shall be treated according to 5.1 treatment. Then perform GC-MS analysis. 5.3 Determination 5.3.1 Chromatographic conditions Column. HP-5MS capillary column [30 m × 0.25 mm (inner diameter) × 0.25 μm] or equivalent type column; 5.4 Qualitative confirmation 5.3 The instrument is under the condition of 5.3.The selected ion chromatogram peaks of test sample solutions OCCUR at the same retention time (0.5%) to that of the standard products. 5.5 Quantitative Analysis This standard adopts the external standard calibration curve method for quantitative determination.

6 Calculation results

Content of phthalate esters compounds (mg/kg) is calculated according to formula (1).

7 Precision

When the content of phthalate esters in food plastic packaging materials is in the range of 0.05 mg/kg - 0.2 mg/kg, the absolute difference of 2 independent test results, obtained under the repeatability condition of this standard, must not exceed 30% of the arithmetic mean.

Appendix A

(Informative) Information of phthalate esters compounds

Appendix B

(Informative) Standard product purity of phthalate esters compounds ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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