On-line controlled high sensitivity spectrophotometer system using a flow through absorbance cell.

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  • SATOH Keiichi
    Department of Chemistry, Faculty of Science, Niigata University
  • KIKUCHI Yoichi
    Department of Chemistry, Faculty of Science, Niigata University
  • SUZUKI Toshio
    Department of Chemistry, Faculty of Science, Niigata University
  • SAWADA Kiyoshi
    Department of Chemistry, Faculty of Science, Niigata University

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Other Title
  • フローセルとマイクロコンピューター利用による分光光度計の高感度化
  • フローセル ト マイクロコンピューター リヨウ ニ ヨル ブンコウ コウドケイ

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Abstract

An advantage of the spectrophotometer system based on a commercial high sensitivity spectrophotometer equipped with a flow through absorbance cell and an external microcomputer for the low-absorbance measurement is described. The use of a flow through absorbance cell (light pass : 100 mm) fixed in a cell compartment eliminates the errors caused by the exchange of absorbance cells. The smoothing of spectra and the correction of baseline drift performed on the external microcomputer greatly improve the quality of spectra. These contrivances made it possible to read out an absorbance of 0.0001 as a significant figure. Consequently, the sensitivity of this system was improved about 100 times compared to the usual methods. This system was applied to the spectrophotometric determination of iron (III) with Xylenol Orange, and a detection limit of 0.1 μg dm-3 was obtained.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 38 (4), T54-T58, 1989

    The Japan Society for Analytical Chemistry

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