Intestinal permeability of metformin using single-pass intestinal perfusion in rats

Table 1 Accuracy and precision data for assays of metformin and phenol red in perfused solution

Concentration(μg/mL)	Intra-d (n = 5)		Inter-d (n = 5)
	Accuracy Mean RE %	Precision CV %	Accuracy Mean RE %	Precision CV %
Metformin
10	-0.9	3.2	-3.5	4.2
50	1.5	1	6.8	6.3
200	0.9	2.1	10.5	0.7
Phenol red
20	-2.4	3.8	7.8	6.4
40	-1.4	2.1	6.6	6.1
60	1.6	3.1	14.4	3.3