This Technical Specification specifies an analytical method for testing food grade, recycled polyethylene terephthalate (PET). This analytical method provides / is intended to be used as a quality control check. This test identifies and quantifies certain specified contaminants. Such contaminants are referred to as Marker Compounds.

The analytical method is applicable for use on PET samples and products at all stages in the recycling process and will therefore be useful to recycling companies producing commercial, recycled PET for food contact materials and articles, and the manufacturers of such articles.

This Technical Specification is without prejudice to any existing legislation.

NOTE Marker compounds are known to originate from two sources:

from the PET material itself (i.e. residual monomers, degradation products or reaction/breakdown products);
from food products that the PET has contacted during its “first use”.

WARNING – The use of this Technical Specification might involve hazardous materials, operations and equipment.

Persons using this Technical Specification should be familiar with normal laboratory practise. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practises and to ensure compliance with any national regulatory conditions.

IMPORTANT – It is absolutely essential that tests conducted according to this Technical Specification be carried out by suitably trained staff.

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PDF Pages	PDF Title
4	Contents Page
6	Foreword
7	Introduction
8	1 Scope 2 Normative references 3 Terms and definitions
10	4 Symbols and abbreviations 5 Principle Table 1 — Selected analytes – i.e. marker compounds 6 Reagents
11	6.1 Carrier gases for gas chromatography 6.2 Solvent 6.3 Standard solutions 7 Apparatus 7.1 Cryogenic mill 7.2 Laboratory glassware 7.3 Headspace gas chromatograph-mass spectrometer 7.4 Capillary column 7.5 Refrigerator and freezer
12	7.6 Sieves 7.7 Analytical balance 8 Procedures 8.1 Introduction 8.2 Sample conservation 8.3 Grinding of the PET samples 8.3.1 General 8.3.2 Initial preparation 8.3.3 Cleaning of the cryogenic mill prior to use and in-between samples
13	8.3.4 Cryogenic milling of the samples 8.3.5 Sieving of ground samples 8.4 Preparation of standard solutions 8.4.1 General 8.4.2 Stock solution A
14	Table 2 — Order of analyte addition 8.4.3 Stock solution B 8.4.4 Spiking solution
15	8.5 Blank determinations 8.6 Preparation of sample vials 8.7 Gas chromatographic analysis 8.7.1 General 8.7.2 Identification and quantification of analytes using the standard addition method 8.7.2.1 Measurement
16	8.7.2.2 Identification 8.7.2.3 Quantification
17	Figure 1 – Illustration of peak areas 9 Interference 9.1 Interference during sampling and storage 9.2 Interference due to co-elution 10 Test report
18	Annex A (informative) Representative chromatograms A.1 Total ion chromatogram of all six analytes Figure A.1 – Total ion chromatogram of all six analytes A.2 Chromatograms of individual analytes in the selected ion monitoring mode
19	Figure A.2 – Section (0 min to 4,7 min) of the selected ion chromatogram Figure A.3 – Section (8 min to 15,2 min) of the selected ion chromatogram
20	Annex B (informative) Example of instrument settings B.1 General B.2 Headspace sampler conditions Table B.1 — Headspace sampler conditions
21	B.3 Gas chromatography – mass spectrometry (GC-MS) – conditions Table B.2 — GC-MS-conditions B.4 Specific ions for selected ion mode (SIM) Table B.3 — Diagnostic ions for analytes
22	Annex C (informative) Performance characteristics C.1 General C.2 Limit of detection C.3 Limit of quantification
23	C.4 Precision C.5 Accuracy Table C.1 — Accuracy
24	C.6 Linearity C.7 Validation results Table C.2 — Limit of detection LOD, Limit of quantification LOQ, Precision, Linearity
25	Bibliography

Published By	Publication Date	Number of Pages
BSI	2015	28


PDF Format	Searchable	Printable	Preview Now

Status	Confirmed
Pages	28
Publication Date	2015-06-30
ISBN	978 0 580 88025 4
Standard Number	PD CEN/TS 16861:2015
Title	Plastics. Recycled plastics. Determination of selected marker compounds in food grade recycled polyethylene terephthalate (PET)
Identical National Standard Of	CEN/TS 16861:2015
Descriptors	Vocabulary, Plastics, Terminology, Plastics and rubber technology, Polymers
Publisher	BSI
Committee	PRI/89
ICS Codes	13.030.50 - Recycling

BSI PD CEN/TS 16861:2015

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