Table 1.

Calibration curves of the five ingredients.

Analyte	LOD (μg/mL)	Slope ± SD	Intercept ± SD	r	Linear range (μg/mL)
DSS	0.04	0.1134 ± 0.005	−0.0347 ± 0.0017	0.9936	0.16–8.0
RA	0.05	0.1909 ± 0.012	−0.0031 ± 0.0003	0.9938	0.151–7.55
LA	0.04	0.1813 ± 0.011	−0.0437 ± 0.0035	0.9932	0.175–17.5
SAB	0.06	0.2604 ± 0.013	0.0964 ± 0.0012	0.9919	0.187–18.7
HP	0.05	0.0926 ± 0.006	−0.0095 ± 0.0007	0.9972	0.15–7.5