Metal content and physicochemical parameters used as quality criteria in virgin argan oil: influence of the extraction method.
Metal content was determined in 26 samples of virgin argan oil from Morocco. An ETA-AAS with previous sample dilution with MIBK technique was used. In oil obtained by traditional method, Fe ranged from 0.8 to 4.0 mg/kg, Cu from 160.4 to 695.7 microg/kg, Cr from 10.3 to 55.3 microg/kg, Mn from 18.1 to 70.8 microg/kg, and Pb from 28.5 to 450.0 microg/kg. In oil obtained by a half-industrialized method, Fe ranged from 0.8 to 1.7 mg/kg, Cu from 158.4 to 385.0 microg/kg, Cr from 10.0 to 48.1 microg/kg, Mn from 15.0 to 68.5 microg/kg, and Pb from 32.0 to 100.0 microg/kg. Acidity value, peroxide index, K270 and K232, humidity and sludge volatile, and insoluble sludges in petroleum ether were also determined. A high variability in these quality parameters and a decrease of the quality in the oils obtained by the traditional method were observed.
Marfil
Rocio
R
Departamento de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Granada, Campus de Cartuja, C.P. 18012, Granada, Spain.
Cabrera-Vique
Carmen
C
Giménez
Rafael
R
Bouzas
Paula R
PR
Martínez
Olga
O
Sánchez
Jose Antonio
JA
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002857:Chromium / Q000032:analysis; D003300:Copper / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008345:Manganese / Q000032:analysis; D008670:Metals / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry*; D029632:Sapotaceae / Q000737:chemistry*; D013054:Spectrophotometry, Atomic
D008670:Metals; D010938:Plant Oils; D002857:Chromium; D007854:Lead; D008345:Manganese; D003300:Copper; D007501:Iron