A rapid, reusable, and portable electrochemical assay for caffeine monitoring in beverage samples based on boron doped diamond and multi walled carbon nanotubes

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

A rapid, reusable, and portable electrochemical assay for caffeine monitoring in beverage samples based on boron doped diamond and multi walled carbon nanotubes

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

A rapid, reusable, and portable electrochemical assay for caffeine monitoring in beverage samples based on boron doped diamond and multi walled carbon nanotubes

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Diamond and Related Materials

ISSN

0925-9635

e-ISSN

1879-0062

Svazek periodika

156

Číslo periodika v rámci svazku

June 2025

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

13

Strana od-do

112450

Kód UT WoS článku

001495289900001

EID výsledku v databázi Scopus

2-s2.0-105005211614