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Quantitative determination of glycyrrhizinic acid by square-wave

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Academic year: 2017

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Fig. 1. Square-wave voltammogram of 1  × 10 -5 mol/L glycyrrhizinic acid solution recorded in 0.1 mol/L KI  electrolyte solution buffered to pH 4.7
Fig. 2. Dependence of the peak currents on the accumulation  time for different glycyrrhizinic acid concentration  recorded in 0.1 mol/L KI buffered to pH = 4.7
Fig. 4. Dependence of the peak currents (curve 1) and peak  potentials (curve 2) on the signal amplitude
Fig. 5. Chromatograms of: I - glycyrrhizinic acid, standard  substance (100  µ g/ml), II – sample

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