Analysis of Extinction Spectrum Apparent Property and Extraction of Specific Wavelength of Milk Fat Particles in Liquid Absorbing Medium

Inversion method of particle size distribution of milk fat based on improved MPGA

“…The prepared simulated liquid was then measured with a Malvern particle size analyzer. According to the analyzer, the size of the measured particle system was 5.075 ( Ding et al, 2020 ).…”

“…As can be seen from Figure 1 , the whole system included photoelectric sensor, light source, data receiving unit and sample pool. Lasers of 0.3838, 0.4598, 0.5163, 0.6269 and 0.77 were selected as the light source ( Ding et al, 2020 ). To improve accuracy, the study used quartz cuvette with low light consumption as the sample pool, the thickness of which was 12.33 mm.…”

“…To improve accuracy, the study used quartz cuvette with low light consumption as the sample pool, the thickness of which was 12.33 mm. The light intensity of each wavelength was collected by the optical power detection device (optical power meter) ( Ding et al, 2020 ).…”

“…To avoid errors, the ratio of the first result and the second result was processed and calculated by the computer as the extinction value ( Wang, 2013 ). The excitation experiment was repeated for 20 times on the simulated liquid of milk fat particles with lasers of different wavelengths, and the average of the results was taken as the final light intensity ( Cai et al, 2010 ; Wang, 2013 ; Wang and Sun, 2013 ; Ding et al, 2020 ).…”

“…Based on the extinction spectra calculated by known specific parameters, an inversion algorithm is built to generate a more precise particle size distribution. Apparent optical parameters ( Fu and Sun, 2001 ; Yang et al, 2002 ; Fu and Sun, 2006 ; Ding et al, 2020 ; Wrana et al, 2020 ) are introduced based on total light scattering to solve the extinction coefficient and create an objective function. This effectively overcomes the influence of the light-absorbing medium.…”