Journal
ELECTROANALYSIS
Volume 33, Issue 10, Pages 2226-2234Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.202100196
Keywords
Electrochemical sensor; Nano-participles; Xanthine; Theophylline; Theobromine
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Funding
- Ankara University Research Fund [20L0430001]
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The study presents a novel sensor for the simultaneous determination of purine molecules on a PGE modified with a composite solution including NiO nanoparticles, MWCNT, and NNaM. The sensor achieved excellent performance in detecting xanthine, theophylline, and theobromine in three real-world samples.
We report the simultaneous determination of purine molecules with biological significance on pencil graphite electrode (PGE) modified with a composite solution including NiO nanoparticles, multi-walled carbon nanotube (MWCNT), and natural nano-Na-montmorillonite clay (NNaM) using DPV technique. The novel sensor, NiO/MWCNT/NNaM/PGE, achieved simultaneous determination of xanthine, theophylline, and theobromine at the detection limits 0.077 mu M, 0.361 mu M, and 0.458 mu M with the linear working ranges 0.5-150 mu M, 5-200 mu M, and 5-250 mu M in Britton-Robinson buffer at pH 2.0, respectively. The sensor revealed excellent performance for the simultaneous determination of XT, TP, and TB in three real-world samples.
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