Abstract
Triprolidine (Trip) ion selective electrodes of three types: the conventional polymer membrane (I), graphite coated electrode (II) and carbon paste electrode (III), have been prepared, based on the ion pair of triprolidine hydrochloride with sodium tetraphenylborate. The electrodes exhibit a linear response with a mean calibration graph slope of 56.12, 55.00 and 54.32 mV decade−1 at 25°C for I, II and III, respectively, within the concentration ranges 1.96 × 10−5–1.00 × 10−2 M for I and 3.84 × 10−5–1.00 × 10−2 M for II and III. The detection limits are 1.13 ± 0.13 × 10−5, 1.70 ± 0.06 × 10−5 and 1.78 ± 0.05 × 10−5 M for the three electrodes, respectively. The change of pH within the ranges 4.85–8.75 and 4.70–8.50 for I and III, respectively, did not affect the electrode performance. The standard electrode potentials were determined at different temperatures and were used to calculate the isothermal coefficient of the electrode. The electrodes showed a very good selectivity for Trip with respect to a large number of inorganic cations and compounds. The standard addition method was applied to the determination of TripCl in pure solution, pharmaceutical preparations, and urine samples.
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Zayed, S.I.M. New Plastic Membrane and Carbon Paste Ion Selective Electrodes for the Determination of Triprolidine. ANAL. SCI. 20, 1043–1048 (2004). https://doi.org/10.2116/analsci.20.1043
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DOI: https://doi.org/10.2116/analsci.20.1043