Detecção eletroquímica de cafeína utilizando um eletrodo de nanoparedes de carbono dopado com boro (B:CNW)
Over the years there have been significant increases in the production and consumption of caffeine worldwide, this popularity is due to its important physiological effects, however, its unregulated use and inadequate dosages can cause serious problems in the short and long term. Taking great interes...
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| Định dạng: | Dissertação |
| Ngôn ngữ: | pt_BR |
| Được phát hành: |
Universidade Federal do Rio Grande do Norte
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| Những chủ đề: | |
| Truy cập trực tuyến: | https://repositorio.ufrn.br/handle/123456789/46458 |
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| Tóm tắt: | Over the years there have been significant increases in the production and consumption
of caffeine worldwide, this popularity is due to its important physiological effects,
however, its unregulated use and inadequate dosages can cause serious problems in the
short and long term. Taking great interest and concern from the scientific community in
studying and proposing new effective ways to monitor the dosage used for the production
of products containing caffeine. Electrochemical techniques suggest a new and efficient
way to detect caffeine quickly. Using simple instrumentation, they provide an efficient
detection sensitivity for the compound of interest. The present work will address the use
of a new boron-doped carbon nanowall electrode (B:CNW) for the detection of caffeine.
Electrochemical studies were performed on synthetic and real samples, the results showed
that the new electrode presented an anodic signal for caffeine in the range of 1.35 V, the
analysis of the regression residues showed that there is a linear response, obtaining a limit
detection of 79,70 µM. The electrode was able to efficiently quantify low concentrations
of caffeine present in real samples of commercial products. The results and previous
studies carried out so far, demonstrate the potential of this modified electrode for future
applications in food sensors, but further study and improvement in experimental
parameters is required for its use as a chemical and biological sensor. |
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