Análise de imagens para a determinação de parâmetros de cinética química
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Data
2024-05-31
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Universidade Federal de Goiás
Resumo
A low-cost experimental apparatus was built from a video capture device (smartphone)
and a lighting box. This system was used to determine the rate constant of fading of
Phenolphthalein in NaOH (pH > 10) using video analysis. All computational development
was carried out using free software. The analytical methodology developed is statistically
equivalent to the determination made by the reference spectrophotometric method (λ =
550 nm). A case study using categorization was designed to evaluate the use of video
analysis methodology as a teaching tool in a class on the Experimental Physical Chemistry
course. The results obtained reinforce that the methodology developed showed good
agreement between the results obtained in the classroom and those in the literature.
There was also a positive interest among students in the alternative approach, highlighting
the practicality and mobility offered by the new methodology. In other words, this
methodology can also be effective in teaching laboratories, especially as a low-cost
alternative to the use of UV/Vis spectrophotometers.
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Citação
OLIVEIRA, I. M. Análise de imagens para a determinação de parâmetros de cinética química . 2024. 82 f. Dissertação (Mestrado em Química) - Instituto de Química, Universidade Federal de Goiás, Goiânia, 2024.