A rapid, reusable, and portable electrochemical assay for caffeine monitoring in beverage samples based on boron doped diamond and multi walled carbon nanotubes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39923403" target="_blank" >RIV/00216275:25310/25:39923403 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.diamond.2025.112450" target="_blank" >https://doi.org/10.1016/j.diamond.2025.112450</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.diamond.2025.112450" target="_blank" >10.1016/j.diamond.2025.112450</a>
Alternative languages
Result language
angličtina
Original language name
A rapid, reusable, and portable electrochemical assay for caffeine monitoring in beverage samples based on boron doped diamond and multi walled carbon nanotubes
Original language description
Despite potential health risks at high doses, caffeine remains the most widely consumed psychoactive drug globally, naturally occurring in more than 60 plants. Accurate determination of caffeine content is crucial to ensure the safety of consumers of caffeine-containing beverages. This work explores two different electrochemical sensors for caffeine determination: screen-printed carbon electrodes modified with multi-walled carbon nanotubes (MWCNT SPEs) and screen-printed sensors with boron-doped diamond electrodes prepared by chemical vapor deposition (BDD SPEs). These sensors offer advantages over traditional methods, potentially providing faster and more portable analysis. Two linear ranges for caffeine determination were observed at BDD SPEs in 0.5 M H2SO4. A lower linear range between 20 mu M and 80 mu M resulted in a limit of detection (LOD) of 3.40 mu M and a limit of quantification (LOQ) of 10.30 mu M, while a higher linear range between 100 mu M to 500 mu M provided the LOD of 9.72 mu M and the LOQ of 29.45 mu M of caffeine. MWCNT SPEs showed the optimal analytical parameters in the Britton-Robinson buffer at pH 2 with a broader linear range from 33 mu M to 500 mu M; the LOD was 8.65 mu M, and the LOQ was 26.20 mu M. The determination of caffeine content was successfully conducted in real dietary samples using both sensors, with validation by high-performance liquid chromatography (HPLC) and spectrophotometric analysis.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Diamond and Related Materials
ISSN
0925-9635
e-ISSN
1879-0062
Volume of the periodical
156
Issue of the periodical within the volume
June 2025
Country of publishing house
CH - SWITZERLAND
Number of pages
13
Pages from-to
112450
UT code for WoS article
001495289900001
EID of the result in the Scopus database
2-s2.0-105005211614