Determining Calcium Activity In Oral Fluids By Ion- Selective Electrode: Evaluation Of The Method And Simplified Calculation Of Ion-Activity Products

Life Sciences & Biotechnology Update, Feb, 2001

This (American Dental Association Health Foundation) report addresses the measurement of calcium activity in oral fluids by selective electrode. The activity of calcium in plaque fluid is needed to calculate the saturation level of that fluid relative to the tooth mineral. One method to determine the calcium activity in very small plaque-fluid samples is by micro ion-selective electrode (ISE). Two commercially available calcium ionosphores, a neutral-carrier and a charged-carrier, are evaluated in micro ISEs and compared to a commercially available macro ISE, using saliva as a model for plaque fluid.

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