Quantitative analysis was carried out by GC-FID using a Hewlett-
Packard 6890 GC system with split injection connected to a 7673
automatic liquid sampler (Agilent Technologies, Palo Alto, CA).
Separation was achieved on a DB-WAX column (20-m _ 0.12-mm
i.d., 0.18-ím film thickness) purchased from J & W Scientific, Agilent
Technologies. The injector and detector temperatures were 250 and
280 °C, respectively. The column temperature program was 100 °C
for 1 min, then increased by 5 °C/min to 250 °C, and held at 250 °C
for 1 min. Standard solutions of a mixture of FAMEs at three different
concentrations in the range of 5 to 150 íg/mL were used for generating
standard calibration curves. A 50-íL sample of methyl heptadecanoate
(1 mg/mL) was added as internal standard to 1-mL aliquots of each
standard sample. Injections of 1 íL were used, and duplicate determinations
were performed.
Quantitative analysis was carried out by GC-FID using a Hewlett-Packard 6890 GC system with split injection connected to a 7673automatic liquid sampler (Agilent Technologies, Palo Alto, CA).Separation was achieved on a DB-WAX column (20-m _ 0.12-mmi.d., 0.18-ím film thickness) purchased from J & W Scientific, AgilentTechnologies. The injector and detector temperatures were 250 and280 °C, respectively. The column temperature program was 100 °Cfor 1 min, then increased by 5 °C/min to 250 °C, and held at 250 °Cfor 1 min. Standard solutions of a mixture of FAMEs at three differentconcentrations in the range of 5 to 150 íg/mL were used for generatingstandard calibration curves. A 50-íL sample of methyl heptadecanoate(1 mg/mL) was added as internal standard to 1-mL aliquots of eachstandard sample. Injections of 1 íL were used, and duplicate determinationswere performed.
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