Banca de DEFESA: ROALLISSON SPAYCK DE OLIVEIRA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ROALLISSON SPAYCK DE OLIVEIRA SILVA
DATE: 30/10/2021
TIME: 07:00
LOCAL: VIDEOCONFERÊNCIA
TITLE:

ELECTROCHEMICAL DETECTION OF CAFFEINE USING A BORON DOPED CARBON NANOWALL ELECTRODE (B: CNW)

KEY WORDS:

Boron-doped carbon nanocouple electrode, Cyclic voltammetry, Differential pulse voltammetry, Caffeine.

PAGES: 70
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Analítica
SPECIALTY: Eletroanalítica
SUMMARY:

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 7.97 x 10-5 M. 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.

BANKING MEMBERS:
Presidente - 1645110 - CARLOS ALBERTO MARTINEZ HUITLE
Externa à Instituição - DANYELLE MEDEIROS DE ARAUJO - UERN
Externa ao Programa - 2275848 - ELISAMA VIEIRA DOS SANTOS