The
separation was conducted at CNW (a German company) CD-1 column
(bonded dimethyl siloxane = 100%, length = 30 m, internal
diameter = 0.32 mm, and df = 5.00 lm). The GC oven heating procedure
was conducted as follows: (1) initial heating temperature
of 80 C for 2 min; (2) temperature increased to 150 C at 20 C/
min; and (3) temperature held at 150 C for 18 min. The injector
temperature was 80 C. An FPD detector with a sulfur filter and
an opening temperature of 220 C was used.