Amperometric Detection Under Batch-Injection Analysis Conditions of Caffeine on an Electrode Modified by Mixed-Valence Iridium and Ruthenium Oxides
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Mixed-valence Ir–Ru oxides (IrOx—RuOx) electrodeposited on a glassy-carbon electrode surface were found to exhibit catalytic activity for caffeine oxidation. An amperometric method for caffeine detection at this modified electrode under batch-injection analysis conditions was developed. The analytical signal was linearly dependent on the caffeine concentration in the range 5 × 10−8 – 5 × 10−3 M. The developed method was tested for caffeine determination in tablets, solutions for injection of caffeine—sodium benzoate, and coffetamin tablets.
Keywordschemically modified electrodes mixed-valence Ir–Ru oxides caffeine electrochemical oxidation batch-injection analysis
The work was sponsored by the Russian Foundation for Basic Research (Grant No. 13-03-01101).
- 8.L. G. Shaidarova and G. K. Budnikov, in: Problems in Analytical Chemistry, Vol. 14, Chemical Sensors [in Russian], Yu. G. Vlasov (ed.), Nauka, Moscow (2011), pp. 203 – 284.Google Scholar
- 9.L. G. Shaidarova and G. K. Budnikov, in: Pharmaceutical Analysis. Ser. Problems in Analytical Chemistry [in Russian], ANRA-MAK-MEDIA, Moscow (2013), pp. 580 – 615.Google Scholar
- 10.L. G. Shaidarova, I. A. Chelnokova, G. F. Makhmutova, et al., Khim.-farm. Zh., 48(7), 95 – 100 (2014).Google Scholar
- 12.L. G. Shaidarova, I. A. Chelnokova, G. F. Makhmutova, et al., Zh. Anal. Khim., 69(9), 946 – 956 (2014).Google Scholar
- 13.FSP 42-0015-5296-04, 2010, Coffetamin.Google Scholar
- 14.FSP 42-0015-6655-05, 2005, Caffeine-Sodium Benzoate.Google Scholar
- 15.FSP 42-0119-1963-06, 2006, Caffeine-Sodium Benzoate.Google Scholar