Table 1.

The regression equations, linear ranges, LLOQs, and LODs of the four compounds.

Compound No.	Linear Regression Equation	R2	Range (ng/mL)	LOD (ng/mL)	LOQ (ng/mL)
1	y = 1861.00x + 46.77	0.9929	9.57–2450	2.71	4.50
2	y = 14370.00x − 36.39	0.9956	4.32–2210	0.93	1.44
3	y = 1076.80x + 32.05	0.9993	8.91–2280	1.66	3.15
4	y = 232.76x + 33.35	0.9971	5.53–2830	1.98	2.76