The
highest values were recorded in the case of variables characterizing
LMF fraction: h1 (r2 ¼ 0.998), DH1 (r2 ¼ 0.997) and for the MLR
model (r2 ¼ 0.999). In contrast, the lowest coefficient of determination
was found for the equation based on parameter h1/h2,
amounting to r2 ¼ 0.966. Accuracy of the determination of PO
content in adulterated samples was assessed using recovery values
(R) and values of the bias parameter (b).