Page B D, Conacher H B, Salminen J, Nixon G R, Riedel G, Mori B, Gagnon J, Brousseau Y
Health and Welfare Canada, Health Protection Branch, Bureau of Chemical Safety, Ottawa.
J AOAC Int. 1993 Jan-Feb;76(1):26-31.
Selected volatile organic compound (VOC) contaminants were determined in 182 samples of retail bottled waters purchased in Canada. Samples included spring water (86) packaged in containers of polyethylene or in smaller containers of transparent plastic or glass, mineral water (61) packaged only in transparent plastic or glass, and miscellaneous bottled waters (35). Analyses were performed by 3 laboratories, each using headspace sampling and capillary gas chromatography with either mass spectrometric (1 laboratory) or flame ionization detection with mass spectrometric confirmation, if required (2 laboratories). Benzene, the contaminant of primary interest, was detected in only 1 of the 182 samples at 2 micrograms/kg. Other VOC contaminants detected (number of positive samples, average, and range of positives in micrograms/kg) included toluene (20, 6.92, 0.5-63), cyclohexane (23, 39.2, 3-108), chloroform (12, 25.8, 3.7-70), and dichloromethane (4, 59, 22-97). Cyclohexane was found in the plastic and as a migrant from the plastic in 20 samples of spring water, but it was found in only 1 of 61 mineral water samples analyzed at only 3 micrograms/kg. Chloroform was found almost exclusively in samples that could have been obtained from public water supplies. It was not found in mineral water samples, but it was found in 1 spring water sample at 3.76 micrograms/kg. The source of the toluene contamination was not known. Other VOCs detected include ethanol and limonene, associated with added flavoring; pentane, as a migrant from a foamed polystyrene cap liner; and 1,1,2,2-tetrachloroethylene in a sample of demineralized water.
对在加拿大购买的182份零售瓶装水样本中的选定挥发性有机化合物（VOC）污染物进行了测定。样本包括包装在聚乙烯容器或较小透明塑料或玻璃容器中的泉水（86份）、仅包装在透明塑料或玻璃中的矿泉水（61份）以及其他瓶装水（35份）。由3个实验室进行分析，每个实验室均采用顶空进样和毛细管气相色谱法，其中1个实验室使用质谱检测，另外2个实验室在需要时使用火焰离子化检测并进行质谱确证。主要关注的污染物苯在182份样本中仅在1份样本中被检测到，含量为2微克/千克。检测到的其他VOC污染物（阳性样本数量、平均值以及微克/千克阳性范围）包括甲苯（20份，6.92，0.5 - 63）、环己烷（23份，39.2，3 - 108）、氯仿（12份，25.8，3.7 - 70）和二氯甲烷（4份，59，22 - 97）。在20份泉水样本中，环己烷存在于塑料中且作为塑料迁移物被发现，但在分析的61份矿泉水样本中仅在1份样本中被发现，含量仅为3微克/千克。氯仿几乎仅在可能取自公共供水的样本中被发现。在矿泉水样本中未发现氯仿，但在1份泉水样本中被发现，含量为3.76微克/千克。甲苯污染的来源未知。检测到的其他VOC包括与添加香料相关的乙醇和柠檬烯；作为泡沫聚苯乙烯瓶盖衬里迁移物的戊烷；以及一份软化水中的1,1,2,2 - 四氯乙烯。
