Determination of polymer additive residues that migrate from coffee capsules by means of stir bar sorptive extraction-gas chromatography-mass spectrometry and PARAFAC decomposition

This paper reports on the difficulties encountered when developing an analytical method for ultra-trace determination, in a complex matrix, of plastic additive residues which are ubiquitous laboratory. The simultaneous qualitative and quantitative determination antioxidant (2,6-di-tert-butyl-4-methyl-phenol, BHT), UV stabilizer (benzophenone, BP), plasticizer (diisobutyl phthalate, DiBP), released from capsules is carried out coffee by means GC–MS parallel factor analysis decomposition. Stir bar sorptive extraction used to extract concentrate analytes. Coffee samples prepared with Milli-Q water, contains target compounds, can be significant should subtracted. In addition, matrix effect exits coffee, so standard addition used. residue concentrations into solid around 3, 1, 12 ?g kg?1 BHT, BP DiBP, respectively.