Department of Analytical Chemistry, University of Córdoba , Campus of Rabanales, E-14071 Córdoba, Spain.
J Agric Food Chem. 2014 Oct 22;62(42):10240-7. doi: 10.1021/jf503431q. Epub 2014 Oct 7.
A simple, robust, and reliable headspace gas chromatography method has been developed for the determination of 14 halogenated volatile organic compounds, including iodinated trihalomethanes (THMs), at nanogram per liter levels in beverages. The main source of the presence of THMs in reconstituted fruit juices, nectars, and soft drinks is the treated water included as an ingredient; the concentration and speciation depend on the volume and disinfection process of the treated water either from the distribution network or from water directly disinfected by the food factory. Chloroform appears at concentrations below 1 μg/L in natural juices and soft drinks prepared with mineral water due to contamination from the chlorinated sanitizers usually employed in the food industry. However, the beverages manufactured with treated water contain, in addition to chloroform, brominated THMs and dichloroiodomethane (detected in beverages for the first time), which can be used as indicators of the presence of treated water.
已开发出一种简单、稳健且可靠的顶空气相色谱法，可用于测定纳克/升水平的 14 种卤代挥发性有机化合物，包括碘代三卤甲烷（THMs），这些化合物存在于饮料中。在调配的果汁、花蜜和软饮料中，THMs 的主要来源是作为成分之一的处理水；其浓度和形态取决于处理水的体积和消毒过程，无论是来自配水系统还是来自食品厂直接消毒的水。由于食品工业中常用的氯化消毒剂的污染，在天然果汁和用矿泉水调配的软饮料中，氯仿的浓度低于 1μg/L。然而，用处理水制造的饮料除了含有氯仿之外，还含有溴代 THMs 和二氯碘甲烷（首次在饮料中检测到），这些物质可用作处理水存在的指示物。
