Study of the main constituents of some authentic walnut oils.
This paper describes the composition of walnut oils obtained from nuts collected from seven countries that are major suppliers of walnut oil. Oils were extracted from the nuts using small-scale industry pressing equipment and analyzed using standard methods for fatty acids, fatty acids in the triacylglycerol 2-position, tocopherols and tocotrienols, triacylglycerols, sterols, steradienes, and iodine value. Values for the composition of the sterols, triacylglycerols, fatty acids, iodine value, and tocopherol composition were generally in good agreement with the results of previous similar surveys. Tocotrienols were not detected in any sample. Steradienes (stigmastadiene, campestadiene, stigmastatriene, and campestatriene) were not detected in any oil.
Crews
Colin
C
Central Science Laboratory, Sand Hutton, York YO41 1LZ, United Kingdom. c.crews@csl.gov.uk
Hough
Patrick
P
Godward
John
J
Brereton
Paul
P
Lees
Michelle
M
Guiet
Sebastien
S
Winkelmann
Wilfried
W
D005227:Fatty Acids / Q000032:analysis; D007455:Iodine / Q000032:analysis; D031324:Juglans / Q000737:chemistry*; D010938:Plant Oils / Q000737:chemistry*; D011786:Quality Control; D013261:Sterols / Q000032:analysis; D024505:Tocopherols / Q000032:analysis; D014280:Triglycerides / Q000032:analysis
D005227:Fatty Acids; D010938:Plant Oils; D013261:Sterols; D014280:Triglycerides; D007455:Iodine; D024505:Tocopherols