CHENG Zhihong, SONG Dingzhong, HOU Huimin*, YUAN Jie, HAO Wusi
2014, 45(9): 880-882.
A head-space capillary GC method was established for the determination of ethyl acetate, n-hexane and six kinds of resin residues in alisol extract. A Rtx-5 column was used for the determination of ethyl acetate and n-hexane, while a Stabilwax-DB column was used for the determination of benzene, toluene, p-xylene, o-xylene, styrene,and divinylbenzene. FID detector was used with temperature programmed control using nitrogen as the carrier gas. Eight residual solvents were separated completely. The calibration curves for the above eight compounds were linear in the ranges of 2.05 - 20.5 μg, 24.88 - 734.7 μg, 0.04 - 0.80 μg, 0.05 - 0.84 μg, 0.03 - 0.85 μg, 0.04 - 0.87 μg, 0.03 - 0.91 μg and 0.09 - 0.91 μg, respectively. The recoveries of ethyl acetate and n-hexane were 112.02％ and 91.65％, with RSDs less than 3.45％, while the recoveries of the others were 85.05％ - 96.32％, with RSDs less than 5.20％.
