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International Journal of Phytomedicine and Phytotherapy

Table 1 The coefficients of the regression equation of calibration curve (Y = a∙X2 + b∙X + c) and coefficients of determination

From: UPLC-MS/MS quantification of quercetin in plasma and urine following parenteral administration

Component to be determined/ biomatrix Coefficients of regression equation Coefficients of determination R2
A b c
Qu/plasma −1.390*10−8 0.0003208 −0.00139 0.9985
Ir/plasma −8.119*10−9 0.0002572 −0.00262 0.9937
Qu/urine 8.866*10−10 0.0000523 0.00106 0.9984
Ir/urine 1.766*10−9 0.0000978 0.00406 0.9983