Kinetic Determination of Total Iodine in Urine and Foodstuffs Using a Mixed Acid as a Pretreatment Agent

DOI PDF Web Site Web Site Web Site View 1 Remaining Hide 1 Citations 17 References Open Access
  • TOMIYASU Takashi
    Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University
  • NONAKA Misa
    Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University
  • UCHIKADO Makoto
    Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University
  • ANAZAWA Katsuro
    Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University
  • SAKAMOTO Hayao
    Department of Earth and Environmental Sciences, Faculty of Science, Kagoshima University

Search this article

Description

An analytical method for the determination of total iodine at the ng level in urine, biological materials and foods was investigated. The organic substances were completely decomposed using a mixed solution of nitric, perchloric and sulfuric acids as pretreatment agents at ca. 230°C. Iodine in the resulting solution was analyzed by a kinetic-photometric method based on the catalytic effect of iodine on the oxidation of chlorpromazine by hydrogen peroxide. The relative standard deviation was 1.6% for 100 ng of iodide and the detection limit of the method was 1.6 ng (3 σ). The proposed method was successfully applied to the determination of iodine at ng levels in real samples.

Journal

  • Analytical Sciences

    Analytical Sciences 20 (2), 391-393, 2004

    The Japan Society for Analytical Chemistry

Citations (1)*help

See more

References(17)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top