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A low-cost optical sensor to quantify bioactive compounds in fruit

This paper discusses the design, development and construction of a low cost system to measure plant-based bioactive compounds. The proposed system uses a light emitting diode (LED), an optical filter, a cuvette holder, a photodiode, an electronic board and a mechanical structure. The results are bas...

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Bibliographic Details
Published in:Journal of food measurement & characterization 2020-12, Vol.14 (6), p.3580-3589
Main Authors: Miranda, João Isaac Silva, Lopes, Mônica Maria de Almeida, de Souza, Kellina Oliveira, Pinho, Hilton Andrade, Rabelo, Marcela Cristina, de Moura, Lucas Pinheiro, Eça, Kaliana Sitonio, de Miranda, Maria Raquel Alcântara, Oliveira, Luciana de Siqueira, Guimarães, Glendo de Freitas
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Language:English
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Summary:This paper discusses the design, development and construction of a low cost system to measure plant-based bioactive compounds. The proposed system uses a light emitting diode (LED), an optical filter, a cuvette holder, a photodiode, an electronic board and a mechanical structure. The results are based on transmittance and reflectance absorptiometric measurements. In order to evaluate the sensitivity of the prototype sensor it was tested against a commercial spectrophotometer. The two systems measured the bioactive compounds of a variety of different fruits (acerola, pineapple, plum, atemoya, banana, cashew apple, kiwi, pitomba, sapodilla, yellow mombin and grape). The coefficient r of the two systems were similar (r = 0.99 for total polyphenols, r = 0.95 for total flavonoids, r = 0.99 for ascorbic acid). Nevertheless, further research is required to improve the precision of this optical sensor, which has significant potential for industrial applications.
ISSN:2193-4126
2193-4134
DOI:10.1007/s11694-020-00601-2