Empirical Modelling of Household Oils in UV-Vis-NIR Spectrum through Developed Low-Cost Spectroscopy Setup (LCSS)

Abstract In this research work, a low-cost \(UV-Vis-NIR\) spectroscopy setup (\(LCSS\)) is developed and presented to analyze transmission (%) and absorption (\(Au\)) from household oils samples. The sensing potential of the developed setup is examined using four different oil samples. These oil samples consist of olive oil, mustard oil, amla oil, and red palm oil. The transmission (%) obtained for olive oil, mustard oil, amla oil, and red palm oil is \(75.66\%\), \(71.10\%\), \(69.87\%\), and \(68.12 \%\) at \(923.2 nm\), \(924.5 nm\), \(925.9 nm,\) and \(927.8 nm\) respectively. Similarly, the absorbance (\(Au\)) for olive oil, mustard oil, amla oil, and red palm oil is \(0.121 Au\), \(0.141 Au\), \(0.153 Au,\) and \(0.163 Au\) at \(920.0 nm\), \(923.0 nm\), \(925.8 nm\), and \(930.2 nm\) respectively. A linear relationship in the wavelength range of \(920 nm\) to \(935 nm\) between transmission (%) and wavelength produce \({R}^{2}=0.9717\) corresponding to a degree (2). Similarly, the linear relation between absorbance (\(Au\)) and wavelength produce \({R}^{2}=0.9997\) corresponding to a degree (2). Finally, an 8th order empirical sinusoidal model is developed for transmission (\(\%\)) and absorbance (\(Au\)) corresponding to the olive oil, mustard oil, amla oil, and red palm oil. The maximum value of \(R-\)square corresponding to the transmission (\(\%\)) for the developed empirical model is obtained for amla oil. Similarly, the full value of the absorbance (\(Au\)) from the developed empirical model is obtained for red palm oil, which indicates a great response towards the empirical sinusoidal model.