Quantitative determination of 1,4-dioxane and tetrahydrofuran in groundwater by solid phase extraction GC/MS/MS
Quantitative determination of 1,4-dioxane and tetrahydrofuran in groundwater by solid phase extraction GC/MS/MS
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DOI：
10.1021/es0615270
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发表时间：
2006-12-01
影响因子：
11.4
通讯作者：
Field, Jennifer A.
中科院分区：
文献类型：
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作者：
Isaacson, Carl;Mohr, Thomas K. G.;Field, Jennifer A.
环醚、1,4-二恶烷（二恶烷）（一种可能的人类致癌物）和四氢呋喃（THF）（许多氯化溶剂释放点的共同污染物）造成的地下水污染日益引起人们的关注。环醚很容易在地下水中迁移，但人们对其在环境系统中的命运知之甚少。高水溶性加上低亨利定律常数和辛醇-水分配系数使得它们从地下水中去除对于补救和分析目的来说都是有问题的。开发了一种基于活性炭盘的固相萃取（SPE）方法，用于定量测定二恶烷和THF。该方法需要 80 mL 样品和总共 1.2 mL 溶剂（丙酮）。由于圆盘的“瓶内”洗脱，步骤数量被最小化。二恶烷和 THF 的平均回收率分别为 98% 和 95%，精确度为 < 2% 至 6% 的相对标准偏差。二恶烷的方法定量限为 0.31 μg/L，THF 的方法定量限为 3.1 μg/L。该方法通过分析在受 TCA 影响的地点的单次采样活动中收集的地下水样品中的二恶烷和 THF 来验证。地下水中二恶烷的浓度和面积范围均大于 TCA 或 THF。
Groundwater contamination by cyclic ethers, 1,4-dioxane (dioxane), a probable human carcinogen, and tetrahydrofuran (THF), a co-contaminant at many chlorinated solvent release sites, are a growing concern. Cyclic ethers are readily transported in groundwater, yet little is known about their fate in environmental systems. High water solubility coupled with low Henry's law constants and octanol-water partition coefficients make their removal from groundwater problematic for both remedial and analytical purposes. A solid-phase extraction (SPE) method based on activated carbon disks was developed for the quantitative determination of dioxane and THF. The method requires 80 mL samples and a total of 1.2 mL of solvent (acetone). The number of steps is minimized due to the "in-vial" elution of the disks. Average recoveries for dioxane and THF were 98% and 95%, respectively, with precision, as indicated by the relative standard deviation of < 2% to 6%. The method quantitation limits are 0.31 mu g/ L for dioxane and 3.1 mu g/ L for THF. The method was demonstrated by analyzing groundwater samples for dioxane and THF collected during a single sampling campaign at a TCA-impacted site. Dioxane concentrations and areal extent of dioxane in groundwater were greater than those of either TCA or THF.