关键词: 顶空, 气相色谱, 有机溶剂, 残留, 食品包装

Abstract: An analytical method was developed for the determination of 15 residual organic solvents in laminated films used for food packages by head-space gas chromatography. The optimal chromatographic conditions are as follows: an DB-624 capillary column （30 m×0.25 mm, 1.40μm）, nitrogen as carrier gas, with a flow rate of 1.40 ml/min column temperature programmed from 45 ℃ （hold 6 min） to 60 ℃ at a rate of 20 ℃/min and kept at 60 ℃ for 4min, and then from 60 ℃ to 200 ℃ at a rate of 20 ℃/min and kept at 200 ℃ for 2 min, flame ionization detector temperature 250 ℃ and injector temperature 220 ℃. The effects of equilibrium temperature and equilibrium time on the determination of residual organic solvents were studied. The results showed that all the 15 organic residues are separated well within 20 min, the standard curves are linear in the range of 0.0040.2 mg/m2 （r>0.998）, the recoveries are 95.4%110.1% with RSD （n=5） in the range of 1.82%5.82%, and the limits of detection （S/N=10） are 0.0130.083 mg/m2 .

Key words: head-space, gas chromatography, organic solvent, residue, food package