title: Determination of Iodide, Iodate and Total Iodine in Natural Water Samples by HPLC with Amperometric and Spectrophotometric Detection, and Off-line UV Irradiation.
abstract: We developed a rapid, simple method for the iodine speciation analysis of water and applied it to natural water samples. Simultaneous determinations of I(-) and IO3(-) were achieved with an HPLC system with amperometric detection for I(-) and spectrophotometric detection after a postcolumn reaction for IO3(-). We determined the I(-) and IO3(-) concentrations in 20-μL water samples within 10 min. Total I concentrations in water samples were determined after the decomposition of organics by off-line UV irradiation for 30 min, followed by reduction to I(-). The analytical conditions were optimized by using test solutions rich in organic matter extracted from soils. We tested the new method with samples of groundwater, spring water, precipitation, soil percolate, stream water, and seawater as well as solutions extracted from soil. The method worked well, although the concentrations of some I species were below detection. This method is suitable for routine speciation analysis, which is important for studies of I behavior in the environment.
authors: Department of Radioecology, Institute for Environmental Sciences.
authors: Akira
authors: A
authors: Takeda
authors: Hirofumi
authors: H
authors: Tsukada
authors: Yuichi
authors: Y
authors: Takaku
authors: Naoya
authors: N
authors: Satta
authors: Mitsuhisa
authors: M
authors: Baba
authors: Toshihiro
authors: T
authors: Shibata
authors: Hidenao
authors: H
authors: Hasegawa
authors: Yusuke
authors: Y
authors: Unno
authors: Shun'ichi
authors: S
authors: Hisamatsu