Determination of acetaldehyde in beer by headspace gas chromatography

A method for the determination of acetaldehyde in beer was established by using the automatic headspace gas chromatography in this paper.Optimization of detection conditions were as below: headspace injector equilibrium temperature 70℃,equilibrium time 30 min;column initial temperature 40℃,temperature-programmed from 10℃/min to 180 ℃;column flow 1.2 mL/min,addition of sodium chloride 1.8 g.The calibration curve showed good linearity in the concentration range of 2~64 mg/L(R2=0.999);good precision was obtained with six easurements.for 10 mg/L standard acetaldehyde solution,RSD,the recoveries and detection limit were 2.5%,96%~108% and 0.4 mg/L,respectively.