Vitali M, Leoni V, Chiavarini S, Cremisini C
Cattedra di Igiene dell'Ambiente e del Territorio, Istituto di Igiene G. Sanarelli, University of Rome, La Sapienza, Italy.
J AOAC Int. 1993 Sep-Oct;76(5):1133-7.
An analytical procedure for the determination of 2-ethyl-1-hexanol (2-EH) in drinking water is presented. The method is based on volatile-compound stripping, adsorption on activated-charcoal-filled tubes, solvent elution, identification by gas chromatography/mass spectrometry, and determination by gas chromatography with flame ionization detection. Bottled samples with undesirable organoleptic characteristics were analyzed to determine a possible correlation with the presence of 2-EH. The presence of 2-EH at 2-10 micrograms/L was confirmed in several samples. The presence of di-2-ethylhexyl phthalate (D2EHP) was also checked in all samples. This compound was always found at 2-30 micrograms/L. Hydrolysis of D2EHP was carried out for 2 weeks to evaluate its possible contribution to water contamination by 2-EH. Tests did not show measurable amounts of the alcohol. Nonetheless, the hydrolysis of phthalates in the weakly acidic conditions of the examined waters would not justify the presence of 2-EH at the observed levels, and so it is reasonable to hypothesize a direct contamination from packaging materials containing 2-EH as residue from D2EHP synthesis.
本文介绍了一种测定饮用水中2-乙基-1-己醇（2-EH）的分析方法。该方法基于挥发性化合物吹扫、填充活性炭管吸附、溶剂洗脱、气相色谱/质谱鉴定以及火焰离子化检测气相色谱测定。对具有不良感官特性的瓶装样品进行分析，以确定与2-EH存在的可能相关性。在多个样品中确认存在浓度为2-10微克/升的2-EH。还对所有样品检测了邻苯二甲酸二（2-乙基己基）酯（D2EHP）的存在情况。该化合物的浓度始终为2-30微克/升。对D2EHP进行了为期2周的水解实验，以评估其对2-EH水污染的可能贡献。实验未检测到可测量的醇含量。然而，在所检测水体的弱酸性条件下，邻苯二甲酸酯的水解无法解释所观察到的2-EH水平，因此合理推测其直接污染源是含有2-EH作为D2EHP合成残留的包装材料。
