Qualitative and quantitative analysis of monomers in polyesters for food contact materials
- 21 December 2016
- journal article
- research article
- Published by Taylor & Francis Ltd in Food Additives & Contaminants: Part A
Abstract
Polyesters (PESs) are gaining more importance on the food contact material (FCM) market and the variety of properties and applications is expected to be wide. In order to acquire the desired properties manufacturers can combine several FCM-approved polyvalent carboxylic acids (PCAs) and polyols as monomers. However, information about the qualitative and quantitative composition of FCM articles is often limited. The method presented here describes the analysis of PESs with the identification and quantification of 25 PES monomers (10 PCA, 15 polyols) by HPLC with diode array detection (HPLC-DAD) and GC-MS after alkaline hydrolysis. Accurate identification and quantification were demonstrated by the analysis of seven different FCM articles made of PESs. The results explained between 97.2% and 103.4% w/w of the polymer composition whilst showing equal molar amounts of PCA and polyols. Quantification proved to be precise and sensitive with coefficients of variation (CVs) below 6.0% for PES samples with monomer concentrations typically ranging from 0.02% to 75% w/w. The analysis of 15 PES samples for the FCM market revealed the presence of five different PCAs and 11 different polyols (main monomers, co-monomers, non-intentionally added substances (NIAS)) showing the wide variety of monomers in modern PESs. The presented method provides a useful tool for commercial, state and research laboratories as well as for producers and distributors facing the task of FCM risk assessment. It can be applied for the identification and quantification of migrating monomers and the prediction of oligomer compositions from the identified monomers, respectively.Keywords
This publication has 19 references indexed in Scilit:
- Identification and quantification of oligomers as potential migrants in plastics food contact materials with a focus in polycondensates – A reviewTrends in Food Science & Technology, 2016
- Determination of monomers and oligomers in polyethylene terephthalate trays and bottles for food use by using high performance liquid chromatography-electrospray ionization-mass spectrometryPolymer Testing, 2012
- Analytical approaches to identify potential migrants in polyester–polyurethane can coatingsFood Additives & Contaminants: Part A, 2009
- Analysis of comonomer content and cyclic oligomers of poly(ethylene terephthalate)Polymer, 2002
- ACETALDEHYDE GENERATION IN POLY(ETHYLENE TEREPHTHALATE) RESINS FOR WATER BOTTLESJournal of Macromolecular Science, Part A, 2002
- Migration testing of plastics and microwave‐active materials for high‐temperature food‐use applicationsFood Additives & Contaminants, 1990
- High-performance liquid chromatographic determination of migrating poly(ethylene terephthalate) oligomers in corn oilJournal of Agricultural and Food Chemistry, 1990
- Quantitative determination of dicarboxylic acids and polyols in silicone—polyester resinsJournal of Chromatography A, 1988
- Quantitative hydrolysis-gas chromatographic methods for the determination of selected acids and glycols in polyestersAnalytical Chemistry, 1977
- Formation of diethylene glycol as a side reaction during production of polyethylene terephthalateJournal of Polymer Science Part A-1: Polymer Chemistry, 1970