Simultaneous Quantification of Aspirin, Its Metabolite Salicylic Acid, and Salvianolic Acid B in Human Plasma Using UPLC-MS/MS

Table 2

Calibration curves and correlation coefficients of Sal B, ASA, and SA.

Components	Equation	Correlation coefficient (r)
Sal B	y = 0.0499x + 0.0457	0.9991
	y = 0.482x + 0.0697	0.9988
	y = 0.0436x + 0.0595	0.9986
ASA	y = 0.0211x + 0.00794	0.9959
	y = 0.0213x − 0.00818	0.9972
	y = 0.0187x + 0.00661	0.9966
SA	y = −5.98e − 007x^2 + 0.012x + 0.236	0.9999
	y = −6.67e − 007x^2 + 0.013x + 0.277	0.9999
	y = −4.99e − 007x^2 + 0.0124x + 0.259	0.9988