In Vitro and In Vivo Correlation of Colon-Targeted Compression-Coated Tablets

Table 3

Summary of the calibration standards at different levels of concentration.

Nominal concentration (μg/mL)	Observed concentration (μg/mL) (mean ± SD, )	% CV	% RE
50.00	50.296 ± 0.0077	0.02	0.59
25.00	25.124 ± 0.0037	0.01	0.50
12.50	12.559 ± 0.0031	0.02	0.48
6.25	6.271 ± 0.0021	0.03	0.34
3.125	3.145 ± 0.0007	0.02	0.64
1.56	1.568 ± 0.0011	0.07	0.54
0.80	0.785 ± 0.0002	0.02	−1.82
0.40	0.395 ± 0.0008	0.20	−1.26
0.20	0.198 ± 0.0000	0.01	−0.81
0.10	0.100 ± 0.0001	0.13	0.02
0.05	0.050 ± 0.0004	0.74	−0.77