论文信息 - Determination of total and water soluble iodine in soil by high performance liquid chromatography

Determination of total and water soluble iodine in soil by high performance liquid chromatography

Abstract A high-performance liquid chromatography (HPLC) method for the determination of the amount of iodine was developed and applied to soils. After alkali fusion of a soil sample, the iodine in the form of iodide isolated from coexisting ions was separated on a C18-bonded phase column with acetonitrile-water containing tetrabutylammonium ion as a mobile phase, and the amount of iodine was determined spectrophotometrically at 230 nm. By this method, it was possible to determine the total amount of iodine reaching more than about 1 mg kg−1 in soils. In addition, a method for quantitative speciation of water soluble iodine in soil was also studied by using the HPLC method proposed. Iodine in the water extract of soils was divided into iodide (I¯), iodate (IO3 −), and organically-bound iodine, and the predominant chemical form of iodine in the extract was iodide ion.

[1] K. Yuita. Dynamics of iodine, bromine, and chlorine in soil: II. Chemical forms of iodine in soil solutions , 1992 .

[2] Kazuaki Ito,et al. Ion chromatography of inorganic iodine species using C18 reversed-phase columns coated with cetyltrimethylammonium , 1991 .

[3] P. D. de Jong,et al. Excretion of iodide in 24-h urine as determined by ion-pair reversed-phase liquid chromatography with electrochemical detection. , 1988, Journal of chromatography.

[4] Hironobu Kobayashi,et al. A radiochemical neutron activation analysis for the determination of iodine in soil with the use of alkali fusion. , 1984 .

[5] S. Hirai,et al. Determination of trace elements in reference material Mussel by instrumental neutron activation analysis. , 1984 .

[6] D. Whitehead,et al. The distribution and transformations of iodine in the environment , 1984 .

[7] I. Watanabe,et al. Further study on iodine toxicity in relation to “Reclamation Akagare” disease of lowland rice , 1970 .

[8] K. Tensho,et al. Radio-iodine uptake by plant from soil with special reference to lowland rice , 1970 .