A Simple and Rapid LC-MS/MS Method for the Quantification of Nirmatrelvir/Ritonavir in Plasma of Patients with COVID-19

Table 2

The regression parameters of calibration curves of analytes.

Analytes	Regression type	Linear range (ng/mL)	Regression equations	r
Nirmatrelvir	Linearity	2.0–5000	Y = 37.5581  x + 8.6239	0.9985
Ritonavir	Linearity	2.0–5000	Y = 30.3743  x − 0.0019	0.9956