HUBEI AGRICULTURAL SCIENCES ›› 2021, Vol. 60 ›› Issue (20): 145-148.doi: 10.14088/j.cnki.issn0439-8114.2021.20.029

• Detection Analysis • Previous Articles     Next Articles

Simultaneous determination of ethylene glycol and 1,2-propanediol in pastry by gas chromatography

QIU Yi-xian1, CHEN Ting-ting1, CHEN Yu1, TANG Ming-hua1, QIN Xu-quan2   

  1. 1. Yulin Center for Food and Drug Control,Yulin 537000,Guangxi,China;
    2. Rong County People's Hospital,Rongxian 537599,Guangxi,China
  • Received:2021-03-11 Online:2021-10-25 Published:2021-11-05

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

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