4.4.1. GC–MS

An Agilent 7890 Gas Chromatograph equipped with a 5977 MS (Agilent, Santa Clara, CA, USA) was used for the analysis of the sample. The GC-column was a HP5-MS UI (Agilent Technologies, 30 m, 0.250 mm, 0.25 mm) with helium as the carrier gas, at a flow of 0.8 mL/min. An initial oven temperature of 100 ◦C was set with a 5 min isothermal period followed by heating up to 300 ◦C at a rate of 30 ◦C/min and held for 13 min. The total run time was 25 min. The injection volume was 1 μL in split mode (20:1), and the injector temperature was set at 250 ◦C. The GC–MS operated at scan mode *m*/*z* ranging from 30–550. GC–MS analysis was performed by the Swedish Customs Laboratory, as well as at the JRC. Data have been processed with an ACD/labs spectrus processor.
