改良型固相抽出ガスクロマトグラフィー/質量分析法による兵庫県下の原水及び水道水中の1,4-ジオキサンの高感度定量(<特集>「若手研究者の初論文」)

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1,4-Dioxane was listed as a Standard Item in the New Water Quality Standards for Drinking Water, which was enforced as of April 1, 2004. Its regulated value was set at 0.05mg l^<-1>. Studies of the analytical method that is used to determine 1,4-dioxane by solid phase extraction-GC/MS clarified the following : (1) 1ml of acetone is a sufficient volume for the elution of 1,4-dioxane. Therefore, any losses of 1,4-dioxane that may accompany the concentration process can be prevented. In consequence, the recovery rate can be improved. (2) Blank experiments using 16 kinds of water, including purified water, re-purified water and 14 types of mineral waters, showed that blank peaks were detected from all samples. It was also shown that the blank values of 6 of the treated mineral waters were high. Therefore, for highly sensitive analysis, the blank value from minerals should be considered. (3) The detection and quantitation limits of 1,4-dioxane by this method were 0.02μg l^<-1> and 0.05μg l^<-1>, respectively. Therefore, a concentration of 1/1000 of the Water Quality Standard can be quantified by this method. Using this method, the concentrations of 1,4-dioxane in raw and tap water sampled at 20 sampling sites in Hyogo prefecture were determined. The results show that the range of concentrations that can be detected is between N.D. and 4.2μg l^<-1>. Furthermore, tests that were conducted to compare water sources revealed that the concentration of 1,4-dioxane in ground water samples was higher than for surface waters.
社団法人日本分析化学会の論文
2005-09-05

改良型固相抽出ガスクロマトグラフィー/質量分析法による兵庫県下の原水及び水道水中の1,4-ジオキサンの高感度定量(<特集>「若手研究者の初論文」)

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