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Voltammetric determination of 1-nitropyrene using silver solid amalgam electrode in miniaturized detection cell
 Karásek, Jindřich ; Navrátil, Tomáš (referee) ; Schwarzová, Karolina (advisor)
Jindřich Karásek, diplomová práce KATA 2010 Abstract Meniscus-modified silver solid amalgam electrode was used in miniaturized detection cell. It was constructed for determination of various analytes in decreased volume using 1-nitropyrene as a model analyte. Working electrode was placed together with reference (Ag/AgCl/3 mol.l-1 KCl) and Pt wire auxiliary electrode in miniaturized voltammetric cell, using 120 µl of base electrolyte for measurements. The oxygen was removed from measured solutions by addition of saturated solution of sodium sulphite. Base electrolyte was composed of methanol and Britton - Robinson buffer pH12,0 in the ratio of 7:3. Determination was optimized for DC voltammetry and differential pulse voltammetry. Limits of quantitation were comparable of about 4.10-6 mol.l-1 in both cases. The methods showed reproducible results with relative standard deviation <3.65 % (n = 10).
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