The objective of this study was to determine the extent to which acetaldehyde (AA) and formaldehyde (FA) migrated from polyethylene terephthalate (PET) bottles into mineral water during storage at 25 and 35 o C for 240 days. Generally, AA and FA were observed to migrate more at 35 o C than at 25 o C. The amount of FA in the samples irradiated under UV lamps was higher than in those stored in the dark over the storage period and vice versa for AA. Using a triangular test, the sensory panels distinguished a difference between one sample and the other two mineral water samples that had been exposed to UV lamps after 60 days of storage at 35 o C (p<0.05). At this time, FA and AA concentrations were measured at 267.4 and 515.3 g/L, respectively. After 120 days, an independent mineral water sample from the other two samples in all treatments could be distinguished by the panel members at a significance level of p<0.001. 포장재 물질의 분석방법에 있어서 aldehyde와 기타 휘발성물질 은 분자량이 작고 비등점이 낮아 분리 및 분석이 쉽지 않은데, PET에서의 AA함량의 동정은 일반적으로 headspace gas chromatography(HS/GC)를 이용하여 이루어져 왔다(12). 반면 FA는 HS/ GC법에서 가열에 의해 분해 생성되므로 HS/GC법에 의한 정확 한 정량은 불가능하다고 보고되었다(13). 따라서 분석이 까다로 운 휘발성물질은 2,4-dinitrophenylhydrazine(DNPH) 유도체화를 통 해 분석하거나 HS-SPME(headspace-solid phase microextraction)
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°C. As the incubation temperature increased, the concentrations of nonanal, vinyl benzoate, and decanal increased significantly. When the highdensity polyethylene (HDPE) PET bottle caps were extracted with dichloromethane, the level of Irgafos 168 was found to be 206±20.1 µg/g. The concentration of 2,4-di-tert-butylphenol in water was 4.80±0.2 µg/L. Therefore, it is necessary to avoid exposing PET and HDPE resins to high temperatures during the manufacturing process and storage of bottled water. PET병 재질뿐만 아니라 병마개(cap)로 사용되는 high density polyethylene (HDPE)은 제조 시 첨가되는 첨가제, 단량체나 올리 고머 등 포장재에 함유되어 있던 미반응 물질들이 식품으로 이
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