Gas-liquid Chromatographic Determination of D-Sorbitol in Foods after Separation by Dialysis

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  • TSUDA Taizo
    Shiga Prefectural Institute of Public Health and Environmental Science
  • NAKANISHI Hiroshi
    Shiga Prefectural Institute of Public Health and Environmental Science

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  • 透析法を利用したガスクロマトグラフィーによる食品中のD-ソルビットの分析
  • トウセキホウ オ リヨウシタ ガス クロマトグラフィー ニヨル ショクヒンチュ

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Abstract

A dialysis method was applied to the determination of D-sorbitol in various commercial foods and toothpastes. Extraction was carried out by dialysis against methanol with cellulose tubing. An aliquot of the dialyzate was evaporated to dryness, and the trimethylsilyl derivative of D-sorbitol was formed. The TMS-sorbitol was injected into a gas-liquid chromatograph and measured by means of a flame ionization detector. The recovery of D-sorbitol was in the range of 89%-109%, and the standard deviation was 6.9% (n=16). Contents of D-sorbitol in various commercial products were investigated. For example, sugarless chewing gums contained 29%-52% D-sorbitol. This method is simple and accurate.

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