Rapid Determination of Pemetrexed Concentration and Distribution in Human Breast Cancer Cells (McF-7) Based on UHPLC-MS/MS

Table 2

Linearity regression parameters of pemetrexed.

Analyte	Regression type	Linear range	Weighing factor	Regression equations	R^2
Pemetrexed	Linearity	2–200 ng/mL	1/x^2	Y = 0.003429  x + 0.001325	0.998