2026-11-02T11:38:55Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/61632022-11-24T11:57:09Zcom_10259_4249com_10259_5086com_10259_2604com_10259_3843com_10259_3591com_10259.4_106com_10259_6164com_10259_4534col_10259_6165col_10259_4250col_10259_6162

Valverde Som, Lucía Reguera Alonso, Celia Herrero Gutiérrez, Ana Sarabia Peinador, Luis Antonio Ortiz Fernández, Mª Cruz 2021-06 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 in the laboratory. The simultaneous qualitative and quantitative determination of an antioxidant (2,6-di-tert-butyl-4-methyl-phenol, BHT), an UV stabilizer (benzophenone, BP), and a plasticizer (diisobutyl phthalate, DiBP), released from plastic capsules is carried out in coffee by means of GC–MS and parallel factor analysis decomposition. Stir bar sorptive extraction is used to extract and concentrate the analytes. Coffee samples are prepared with Milli-Q water, which contains residues of the target compounds, which can be significant for ultra-trace analysis and should be subtracted. In addition, matrix effect exits in coffee, so standard addition method is used. The residue concentrations released from the coffee capsules into the solid coffee are around 3, 1, and 12 μg kg−1 of BHT, BP and DiBP, respectively. http://hdl.handle.net/10259/6163 eng Elsevier Determination of polymer additive residues that migrate from coffee capsules by means of stir bar sorptive extraction-gas chromatography-mass spectrometry and PARAFAC decomposition info:eu-repo/semantics/article TEXT RIUBU. Repositorio Institucional de la Universidad de Burgos Hispana