한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
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PET 생수병 내 휘발성 물질의 동정 및 이행량 분석

Identification of the Volatile Compounds in Polyethylene Terephthalate Bottles and Determination of Their Migration Content into Mineral Water

  • 정의민 (강릉원주대학교 식품가공유통학과) ;
  • 김동주 (강릉원주대학교 공동실험실습관) ;
  • 이근택 (강릉원주대학교 식품가공유통학과)
  • Jung, Eui Min (Department of Food Processing and Distribution, Gangneung-Wonju National University) ;
  • Kim, Dong Joo (The Center for Scientific Instruments of Gangneung-Wonju National University) ;
  • Lee, Keun Taik (Department of Food Processing and Distribution, Gangneung-Wonju National University)
  • 투고 : 2013.09.03
  • 심사 : 2013.11.03
  • 발행 : 2014.02.28
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초록

본 연구에서는 PET preform, 성형된 PET병, 그리고 PET병 생수에서 HS-SPME GC/MS를 통해 휘발성 물질을 동정하고 HDPE cap으로부터 생수에 이행된 2,4-DTBP의 이행량을 분석하였다. PET preform과 완성된 PET에서 nonanal과 decanal이 확인되었다. 이 물질들은 이취의 원인 물질로서 preform보다 PET병에서 농도가 더 높게 나타났으며, PET병에 대해 온도 증가에 따른 휘발성 물질을 분석한 결과 온도가 증가할수록 물질의 농도가 증가하였다. 특히 nonanal, vinyl benzoate, 그리고 decanal과 같이 온도에 민감한 휘발성 물질이 크게 증가하였다. 그리고 생수병의 HDPE cap에서 항산화제인 Irgafos 168을 정량한 결과 $206{\pm}20.1{\mu}g/g$의 농도를 나타내었다. 2,4-DTBP는 항산화제인 Irgafos 168의 분해 물질이므로 생수에서 검출된 2,4-DTBP는 cap에서 생수로 이행된 휘발성 물질로 확인되었으며 이행량은 $4.8{\pm}0.2{\mu}g/L$로 확인되었다. 따라서 PET병 생수의 관능학적 품질을 높이고 소비자의 안전을 위하여 PET 및 HDPE 제조 공정에서 가능한 온도를 낮게 제어하는 기술이 요구되며, 생수 제품의 유통 및 소비자 취급 시 적절한 온도 유지와 올바른 제품 보관을 통하여 저분자의 이취 원인 물질들을 줄이는 것이 중요할 것으로 판단된다.

This study was carried out to identify the volatile organic compounds (VOCs) in polyethylene terephthalate (PET) bottles and to determine the extent to which VOCs migrate into mineral water during the bottling process and storage. A greater amount of nonanal and decanal was generated from the PET bottles than from the PET preforms. Benzene, ethylbenzene, nonanal, and vinyl benzoate were identified from the PET bottles when the incubation temperature of the headspace solid-phase microextraction (HS-SPME) sampler was set to 60, 80, and $100^{\circ}C$. As the incubation temperature increased, the concentrations of nonanal, vinyl benzoate, and decanal increased significantly. When the high-density polyethylene (HDPE) PET bottle caps were extracted with dichloromethane, the level of Irgafos 168 was found to be $206{\pm}20.1\mu}g/g$. The concentration of 2,4-di-tert-butylphenol in water was $4.80{\pm}0.2{\mu}g/L$. Therefore, it is necessary to avoid exposing PET and HDPE resins to high temperatures during the manufacturing process and storage of bottled water.

키워드

참고문헌

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피인용 문헌

  1. Analysis of Off-flavor Generated from a Polyethylene Terephthalate Water Bottles and Caps by Using an Electronic Nose vol.47, pp.4, 2015, https://doi.org/10.9721/KJFST.2015.47.4.425