Instrumentation of a continuous sulfur dioxide analyzer based on starch-iodine colorimetry

DOI Web Site Web Site

Bibliographic Information

Other Title
  • ヨウ素でん粉比色法による二酸化イオウ濃度連続測定装置の試作
  • ヨウソ デンプン ヒショクホウ ニ ヨル 2サンカ イオウ ノウド レンゾク ソクテイ ソウチ ノ シサク

Search this article

Description

An apparatus has been presented for the continuous determination of sulfur dioxide concentration in air, which involves the spectrophotometric measurement of the change of absorbance of starch-iodine solution.<BR>The reagent solution passing through a reference cell is sent to a measuring cell after the reductive decolorization by a contact with sulfur dioxide in air in an absorption column. The difference in the absorbance of the two cells at wavelength 600 mμ is continuously read using a CdS photoconductive cell, by which is given the change of concentration of sulfur dioxide. Among the other pollutants in air, chlorine, hydrogen sulfide and ozone interfere, but carbon dioxide, ammonia, hydrocarbons and carbon monoxide do not. The results of determination indicate that the concentrations of sulfur dioxide in air were generally below 0.01 ppm in urban suburbs, but were 0.20.45 ppm in the vicinity of the street crossings, which showed an almost linear response to the amount of traffics.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 17 (4), 417-422, 1968

    The Japan Society for Analytical Chemistry

Keywords

Details 詳細情報について

Report a problem

Back to top