Aldehyde contamination of mineral water stored in PET bottles
Aldehyde contamination of mineral water stored in PET bottles
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DOI：
10.1080/02652030310001620441
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发表时间：
2003-12-01
影响因子：
2.9
通讯作者：
Nawrocki, J
中科院分区：
文献类型：
--
作者：
Dabrowska, A;Borcz, A;Nawrocki, J
对PET瓶装矿泉水生产过程中可能伴随的醛类污染进行了研究。对波兰的一条碳酸矿泉水生产线进行了监测，并对矿泉水储存常用的PET瓶进行了评价。在一系列瓶装水样品中，甲醛和乙醛是最重要的羰基化合物，但在生产线的水样中也发现了丙醛、壬醛和乙二醛。醛存在于环境中的任何地方，甚至可以在纯水中以低mug l（-1）水平测定。据观察，PET瓶中储存的水中乙醛的浓度主要取决于PET材料中乙醛的浓度，可达到200 μ l（-1）以上。温度、储存时间和二氧化碳气体的浓度有助于醛从瓶壁迁移到矿泉水。碳酸化沃茨的较高压力而不是CO2本身或沃茨的较低pH似乎是乙醛浓度较高的原因。
Aldehyde contaminations that might accompany production of mineral water stored in PET bottles were investigated. One of the production lines of carbonated mineral water in Poland was monitored and PET bottles commonly used for mineral water storage were evaluated. Formaldehyde and acetaldehyde were the most important carbonyls identified in series of bottled water samples, but also propanal, nonanal and glyoxal were found in water samples from the production line. Aldehydes are present everywhere in the environment and can be determined even in pure water at low mug l(-1) levels. It was observed that the concentration of acetaldehyde in water stored in PET bottles depended mainly on the concentration of acetaldehyde in PET material and could reach more than 200 mug l(-1). The temperature, time of storage and concentration of carbon dioxide gas contribute to the migration of aldehydes from bottle walls to mineral water. Higher pressure of the carbonated waters and not CO2 itself or lower pH of waters seems responsible for higher concentration of acetaldehyde.