The work carried out a mathematical separation of the absorption spectrum of the culture of the microalga Spirulina platensis. Culture spectra were recorded on an integrating sphere spectrophotometer. When analyzing the spectrum, the second-order derivative was calculated and the main absorption maxima were determined. The obtained data served as the basis for modeling. The absorption spectrum of the culture of the microalga Spirulina platensis in the region from 400 to 800 nm was described by six Gaussian curves. A general model of the absorption spectrum of a culture from individual pigments was compiled. Using the resulting model, it is possible to determine the concentration of chlorophyll a, total carotenoids and phycobilins directly from the absorption spectrum of the native culture.
Spirulina, carotenoids, chlorophyll a, phycobilins, absorption spectra, Gaussian curves
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