关键词: 糕点, 气相色谱法, 乙二醇, 1,2-丙二醇

Abstract: Establish a method for the simultaneous determination of ethylene glycol and 1,2-propanediol in pastry, using DB-WAX column （30 m×320 μm×0.25 μm）, column flow rate of 1.0 mL/min, sample inlet of 230 ℃, split ratio of 10∶1, detector was hydrogen flame ionization detector, detector temperature was 240 ℃, air flow speed was 350 mL/min, hydrogen flow rate was 40 mL/min, nitrogen flow rate was 25 mL/min, injection volume was 1 μL. The results showed that the linear relationship between ethylene glycol and 1,2-propanediol have good linearity in the range of 990~49 500 ng/mL（r²=0.999 8） and 980~49 000 ng/mL（r²=0.999 7）, respectively. The recovery of ethylene glycol was 93.22%~101.10%, RSD was 2.38%（n=9）, 1,2-propanediol was 95.15%~99.97%, RSD was 1.68%（n=9） at the three levels of 75, 100 and 200 μg. The quantitative limits of ethylene glycol and 1,2-propanediol were 6.53 mg/kg and 6.49 mg/kg respectively. The method has the characteristics of simple operation, good repeatability, good sensitivity and small toxicity of the reagents used. It can provide a reference for the content detection of ethylene glycol and 1,2-propanediol in pastry.

Key words: pastry, gas chromatography, ethylene glycol, 1,2-propanediol