Simple modification of karl-fischer titration method for determination of water content in colored samples

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Abstract

The most commonly used technique for water content determination is Karl-Fischer titration with electrometric detection, requiring specialized equipment. When appropriate equipment is not available, the method can be performed through visual detection of a titration endpoint, which does not enable an analysis of colored samples. Here, we developed a method with spectrophotometric detection of a titration endpoint, appropriate for moisture determination of colored samples. The reaction takes place in a sealed 4 ml cuvette. Detection is performed at 520 nm. Titration endpoint is determined from the graph of absorbance plotted against titration volume. The method has appropriate reproducibility (), accuracy, and linearity ().

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Tavar, E., Turk, E., & Kreft, S. (2012). Simple modification of karl-fischer titration method for determination of water content in colored samples. Journal of Analytical Methods in Chemistry, 1(1). https://doi.org/10.1155/2012/379724

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