The carrier gas was Helium with the flow rate of 1 ml/min. 1l of diluted oil was injected using Finnigan Autosampler AI 3000 (split ratio 1:100). The operating condition of GC oven temperature was started at 60C, held it for
BHST. 2015, 13 (1) : 06-16 Theanphong et al.
8
1 min, ramped at the rate of 3C/min to 240C and held for 5 min. The GC injector and GC-MSD interface temperatures were set at 180C and 290C, respectively.