Development of Compact Photometric Titrator and Absorptiometric Detector for Flow-Injection Analysis Using Light-Emitting Diode as Light Source

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  • SUZUKI Yasutada
    Department of Applied Chemistry, Interdisciplinary School of Medicine and Engineering, University of Yamanashi
  • ITO Takayuki
    Department of Applied Chemistry, Interdisciplinary School of Medicine and Engineering, University of Yamanashi
  • FUKASAWA Tsugio
    Department of Applied Chemistry, Interdisciplinary School of Medicine and Engineering, University of Yamanashi
  • KAWAKUBO Susumu
    Department of Applied Chemistry, Interdisciplinary School of Medicine and Engineering, University of Yamanashi
  • IWATSUKI Masaaki
    Department of Applied Chemistry, Interdisciplinary School of Medicine and Engineering, University of Yamanashi

Bibliographic Information

Other Title
  • 発光ダイオードを光源とする小型光度滴定装置及びフローインジェクション分析用吸光度検出器の開発
  • ハッコウ ダイオード オ コウゲン ト スル コガタ コウド テキテイ ソウチ オヨビ フローインジェクション ブンセキヨウ キュウコウド ケンシュツキ ノ カイハツ

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Abstract

Two colorimetric instruments, a photometric titrator and an absorptiometric detector for flow-injection analysis, were developed for experiments in under-graduate course. They were based on the colorimeter using a light-emitting diode (LED) as a light source. The photometric titrator had a holder for a 2-cm cell and a magnetic stirrer. This titrator was applied to titration of Cu(II) and Ca(II) with EDTA. Cu-ammine complex was produced and its absorbance was measured with a red LED (630 nm). The titration curve obtained by this titrator was better than the one obtained by a conventional titrator. Moreover, the volume of the sample and reagents were greatly reduced due to the built-in stirrer. On the other hands, the detector for FIA had a circuit to output flow-signal to a recorder. This detector was applied to the FIA determination of iron in an aluminum sample with 1,10-phenanthroline. Dual-wavelength measurements were performed to reduce the noise caused by peristaltic pumps. From the absorbance at the wavelength absorbed by iron(II) chelate (530 nm), background signal measured at 630 nm was subtracted. The obtained results were good agreement with those by atomic absorption spectrometry. Both instruments had small dimensions (125 × 90 × 60 mm) and were low power consumption.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 54 (4), 291-295, 2005

    The Japan Society for Analytical Chemistry

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