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DETERMINATION OF 1,4-DIOXANE IN THE CAPE FEAR RIVER WATERSHED BY HEATED PURGE-AND-TRAP PRECONCENTRATION AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY
Sun, M., C. Lopez-Velandia, and D.R.U. Knappe.
Environmental Science & Technology, Vol 50 No 5, 2246-2254, 2016
A rapid and sensitive analytical method capable of quantifying 1,4-dioxane (dioxane) over a wide concentration range in a broad spectrum of aqueous matrices was developed to support dioxane occurrence investigations, source identification, and exposure assessment. Based on heated purge-and-trap preconcentration and GC-MS with selected-ion storage, the fully automated method has a reporting limit of 0.15 µg/L and allows 1,3-dioxane to be distinguished from 1,4-dioxane. The method was applied to investigate dioxane occurrence and sources in North Carolina's Cape Fear River watershed, where concentrations ranged from <0.15 µg/L in surface water to 436 µg/L downstream of a wastewater treatment plant (WWTP) discharge. Discharges from three municipal WWTPs were primarily responsible for elevated dioxane concentrations in the Cape Fear River watershed. Presentation slides: https://chathamconservation.wikispaces.com/file/view/1,4+Dioxane+Cape+Fear+sm.pdf
Environmental Science & Technology, Vol 50 No 5, 2246-2254, 2016
A rapid and sensitive analytical method capable of quantifying 1,4-dioxane (dioxane) over a wide concentration range in a broad spectrum of aqueous matrices was developed to support dioxane occurrence investigations, source identification, and exposure assessment. Based on heated purge-and-trap preconcentration and GC-MS with selected-ion storage, the fully automated method has a reporting limit of 0.15 µg/L and allows 1,3-dioxane to be distinguished from 1,4-dioxane. The method was applied to investigate dioxane occurrence and sources in North Carolina's Cape Fear River watershed, where concentrations ranged from <0.15 µg/L in surface water to 436 µg/L downstream of a wastewater treatment plant (WWTP) discharge. Discharges from three municipal WWTPs were primarily responsible for elevated dioxane concentrations in the Cape Fear River watershed. Presentation slides: https://chathamconservation.wikispaces.com/file/view/1,4+Dioxane+Cape+Fe
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