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Updated: Aug 15, 2026

Dynamic Electrochemical Measurement of Chloride Ions
Published on: February 5, 2016
Measurement of urinary chloride with the Kodak Ektachem 400
Abstract:
Urinary chloride can be measured simply, precisely, and accurately with the Ektachem 400 clinical chemistry analyzer. Because the coated film technique used in this instrument requires the presence of a protein matrix, we added a protein-based calibrator to the urine samples to overcome the low protein concentration in these specimens. Its advantages over a coulometric titration method (Astra analyzer) include the extension of the range of linearity to lower concentrations and the absence of interference from prednisone metabolites in urine. A disadvantage is the negative bias interference of allopurinol.
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