“…After centrifugation, the obtained upper hexane layer was discarded. The remaining solution was mixed with ISOLUTE® (Biotage AB, Uppsala, Sweden), PSA, C18EC (a retentive, non-polar sorbent for extraction of a range of analytes from aqueous samples) and MgSO 4 , and then centrifuged at 755×g for 5 min. A volume of 1000 µL of the extracted solution was transferred into HPLC autosampler vial for acrylamide estimation (16,17).…”