Effect of roasting method and oil reduction on volatiles of roasted Pistacia terebinthus using direct thermal desorption-GCxGC-TOF/MS

TY - JOUR

T1 - Effect of roasting method and oil reduction on volatiles of roasted Pistacia terebinthus using direct thermal desorption-GCxGC-TOF/MS

AU - Ozel, Mustafa Z.

AU - Yanik, Derya K.

AU - Gogus, Fahrettin

AU - Hamilton, Jacqueline F.

AU - Lewis, Alastair C.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Pistacia terebinthus fruit was roasted by either the traditional pan-roasting method or by coupled convection-microwave oven roasting (at two different settings). Cold pressing to reduce the oil content was carried out on samples either before or after the various roasting processes. Oil content of all samples was reduced to approximately 21.8 g/100 g by cold pressing. This allowed the grinding of the roasted fruit into powder form. The volatile compounds of these samples were investigated using direct thermal desorption coupled with gas chromatography. The main compounds found in all samples were acetic acid, limonene, α-pinene, β-pinene, 2-carene and δ-muurolene. Removal of oil was seen to decrease the number of volatile compounds found in roasted fruit (irrespective of roasting method) when compared with previous studies. Compounds specifically relating to coffee aroma (pyrazines, furans and furanones) were seen to be increased when cold pressing was carried out before the roasting process rather than afterwards.

AB - Pistacia terebinthus fruit was roasted by either the traditional pan-roasting method or by coupled convection-microwave oven roasting (at two different settings). Cold pressing to reduce the oil content was carried out on samples either before or after the various roasting processes. Oil content of all samples was reduced to approximately 21.8 g/100 g by cold pressing. This allowed the grinding of the roasted fruit into powder form. The volatile compounds of these samples were investigated using direct thermal desorption coupled with gas chromatography. The main compounds found in all samples were acetic acid, limonene, α-pinene, β-pinene, 2-carene and δ-muurolene. Removal of oil was seen to decrease the number of volatile compounds found in roasted fruit (irrespective of roasting method) when compared with previous studies. Compounds specifically relating to coffee aroma (pyrazines, furans and furanones) were seen to be increased when cold pressing was carried out before the roasting process rather than afterwards.

KW - GCxGC-TOF/MS

KW - Oil

KW - Pistacia terebinthus

KW - Roasting

KW - Volatiles

UR - http://www.scopus.com/inward/record.url?scp=84903758385&partnerID=8YFLogxK

U2 - 10.1016/j.lwt.2014.05.004

DO - 10.1016/j.lwt.2014.05.004

M3 - Article

AN - SCOPUS:84903758385

SN - 0023-6438

VL - 59

SP - 283

EP - 288

JO - LWT - Food Science and Technology

JF - LWT - Food Science and Technology

IS - 1

ER -