Application of conductometric flow injection analysis to the salt contents in soy sauce and worcester sauce.

概要

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The conductometric flow injection method was applied to measuring the salt contents in soy sauce and worcester sauce. When the dilution ratio of the system was 1 part of soy sauce to 885 parts of water (1:885), the regression line between salt content in soy sauce and peak conductivity showed the straight line with a correlation coefficient of 0.994. The coexistent electolyte such as amino acids and sodium benzoate did not interfere in the measurement. For worcester sauce measurement, the dilution ratio was set to be 1:354. The regression line between salt content in worcester sauce and peak conductivity showed the straight line with a correlation coefficient of 0.997. The coexistent acetic acid did not interfer in the measurement. The salt contents measured by the proposed method were also compared with those measured by argentometry, ion selective electrodes methods and flame photometry.
社団法人日本食品科学工学会の論文