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Batch-Injection Amperometric Determination of Caffeine and Theophylline on an Electrode Modified by Carbon Nanotubes and Ruthenium Oxides
Journal of Analytical Chemistry ( IF 1.0 ) Pub Date : 2020-07-31 , DOI: 10.1134/s1061934820080146 L. G. Shaidarova , I. A. Chelnokova , M. A. Il’ina , G. F. Makhmutova , F. F. Akhmatkhanova , H. C. Budnikov
中文翻译:
碳纳米管和氧化钌修饰的电极上的批量注射安培法测定咖啡因和茶碱
更新日期:2020-07-31
Journal of Analytical Chemistry ( IF 1.0 ) Pub Date : 2020-07-31 , DOI: 10.1134/s1061934820080146 L. G. Shaidarova , I. A. Chelnokova , M. A. Il’ina , G. F. Makhmutova , F. F. Akhmatkhanova , H. C. Budnikov
Abstract
A procedure for the batch-injection amperometric determination of caffeine and theophylline using a screen-printed electrode modified with a composite based on ruthenium oxides and functionalized single-walled carbon nanotubes was developed. The effect of the parameters of the batch-injection system on the recorded signals was studied; the optimal detection conditions were selected. The analytical signal linearly depends on the concentration of compounds on the logarithmic coordinates in the range from 5 × 10–9 to 5 × 10–3 M. A possibility of the simultaneous batch-injection amperometric determination of caffeine and theophylline on a modified double screen-printed electrode is demonstrated. The proposed method for the determination of caffeine and theophylline was tested in the analysis of pharmaceutical preparations.中文翻译:
碳纳米管和氧化钌修饰的电极上的批量注射安培法测定咖啡因和茶碱