The analytical performance of the proposed laserbased photoacoustic spectroscopy (LBPAS) and opto-pared to that of the conventional high-performance liquid chromatography (HPLC). Both photothermal techniques (laser-based photoacoustic spectroscopy (LBPAS) and optothermal window (OW)) are direct methods that unlike HPLC obviate the need for the extraction of the analyte. The outcome of the study leads to the conclusion that LBPAS and OW are both changed due to the added sea buckthorn pomace and storage time. The correlation between the two methods and HPLC is linear with R 2 = 0.9897 for LBPAS and R 2 = 0.9928 for OW, respectively. Both methods are capable of the rapid and non-destructive determination for sample pre-treatment.