Отрывок: 2. The sample were excited by 405 nm wavelength laser pointer. The laboratory spectrometer’s detector is a CCD having a spectral resolution of 0.5 nm. Similarly with previous published reports, fluorescent spectrum of EVOO has a strong peak at 675 nm which demonstrates the present of chlorophyll. The fluorescent emission of rice oil, on the other hand, exhibits a broad, high intensity band from 400 nm to 650 nm whic...
Название : Testing edible oil authenticity by using smartphone based spectrometer
Авторы/Редакторы : Mai, Hanh Hong
Le, Tran Thinh
Ключевые слова : spectroscopy
fluorescence and luminescence
image processing
sensors
smartphone
Дата публикации : Апр-2020
Издательство : Самарский национальный исследовательский университет
Библиографическое описание : Mai, H.H. Testing edible oil authenticity by using smartphone based spectrometer / H.H. Mai, T.Th. Le // Компьютерная оптика. – 2020. – Vol. 44(2). – P. 189-194. – DOI: 10.18287/2412-6179-CO-604
Серия/номер : 44;2
Аннотация : In recent years, there has been an increasing interest in the classification of edible vegetable oils, examining authenticity and in detecting possible adulteration of high quality, expensive extra virgin olive oils with low-cost edible oils. Classical methods such as gas chromatography, liquid chromatography, Fourier transform infrared and nuclear magnetic resonance, mass spectrometry, and Raman spectroscopy have been widely applied to examine the authenticity of edible oils. Despite of their high sensitivity and accuracy, these methods are significantly expensive for daily life testing, especially in resource-poor regions. Furthermore, they are time-consuming as samples have to be analyzed in dedicated laboratories. In this paper, we propose a compact, low-cost, portable smartphone-based spectrometer for testing edible oil authenticity. Using simple laboratory optical components and a smartphone, we developed a compact spectrometer which can function in the wavelength range of 400–700 nm with the spectrum/pixel resolution of 0.334 nm/pixel. The images captured by the smartphone were converted into intensity distribution plots versus wavelength. As a proof of concept, the smartphone based spectrometer was utilized to measure the variations in fluorescent intensity of the mixed oils of expensive extra virgin olive oil and low-cost rice oil with different percentages. The results obtained the spectrometer were in good agreement with that from a laboratory spectrometer, thus, confirmed its adequate sensitivity and accuracy. Due to the cost effectiveness, the adequate sensitivity, and the portability, the smartphone based spectrometer can be applied in numerous applications such as in-field testing, lifestyle monitoring, and home diagnostics.
URI (Унифицированный идентификатор ресурса) : https://dx.doi.org/10.18287/2412-6179-CO-604
http://repo.ssau.ru/handle/Zhurnal-Komputernaya-optika/Testing-edible-oil-authenticity-by-using-smartphone-based-spectrometer-83060
Другие идентификаторы : Dspace\SGAU\20200428\83060
Располагается в коллекциях: Журнал "Компьютерная оптика"

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