A 50 mL of each sample or standard solution containing NaCl
(5%, w/v) was transferred into a 70-mL conical bottom glass test
tube. The tube was placed in a water bath (at 80 C) for 5 min
M.A. Farajzadeh et al. / Food Chemistry 212 (2016) 198–204 199
and 1.5 mL DMSO (disperser) and 104 lL 1,2-DBE (extractor)
added rapidly using a 5-mL glass syringe to obtain a moderately
turbid solution. The solution was allowed to cool to room temperature.
The solution became more turbid as the solution cooled.
Then, the cloudy solution was centrifuged at 1431g for 4 min,
which sedimented ca. 20 ± 1 lL of 1,2-DBE at the bottom of the
tube. Finally, 1 lL of 1,2-DBE was injected into the GC-FID.