Table 2. pH-P _e experimental data.

Compounds	pH	P e(cm/s)
		C8	S.D.	C10	S.D.	C12	S.D.
Amoxicillin (×10–7)	4.6	1.9	0.2	1.9	0.2	1.9	0.2
	4.98	2.1	0.2	2.1	0.1	2.1	0.1
	6.57	2.6	0.2	2.5	0.2	2.6	0.2
	8.2	2.4	0.2	2.3	0.2	2.3	0.2
	9.32	2.2	0.2	2.2	0.2	2.0	0.2
Atenolol (×10–6)	4.6	–	–	–	–	–	–
	4.98	2.5	0.4	1.7	0.1	1.5	0.1
	6.57	3.0	0.5	3.2	0.2	3.3	0.4
	8.2	3.8	0.4	3.5	0.4	3.5	0.2
	9.32	4.4	0.1	4.4	0.3	4.4	0.5
Chloroamphenicol (×10–6)	4.6	4.3	0.4	4.2	0.5	4.4	0.4
	4.98	4.2	0.5	4	0.3	4.2	0.6
	6.57	1.7	0.4	1	0.2	1.5	0.4
	8.2	0.6	0.1	0.7	0.1	0.7	0.1
	9.32	0.5	0.1	0.5	0.1	0.5	0.1
Cimetidine (×10–6)	4.6	1.8	0.3	1.8	0.3	1.8	0.4
	4.98	1.6	0.2	1.9	0.1	1.9	0.3
	6.57	2.6	0.1	2.6	0.2	2.7	0.2
	8.2	3.2	0.2	3.1	0.3	3.2	0.2
	9.32	3.7	0.2	3.4	0.3	3.4	0.1
Famotide (×10–6)	4.6	1.1	0.2	1.2	0.2	1.2	0.2
	4.98	2.2	0.1	2.2	0.1	1.2	0.1
	6.57	5.0	0.4	5.7	0.4	6.0	0.1
	8.2	–	–	–	–	–	–
	9.32	5.1	0.2	5.5	0.1	6.1	0.2
Ibuprofen (×10–6)	4.6	23.0	1.5	23.0	1.0	22.5	2.0
	4.98	23.5	2.0	22.0	2.0	23.0	2.5
	6.57	8.5	0.2	7.0	0.1	7.5	0.2
	8.2	3.0	0.1	1.5	0.1	1.5	0.1
	9.32	2.6	0.1	2.6	0.1	2.6	0.1
Metformin Hydrochloride (×10–7)	4.6	1.5	0.1	1.5	0.2	1.6	0.2
	4.98	1.6	0.1	1.6	0.1	1.7	0.2
	6.57	3.2	0.1	3.2	0.2	3.1	0.1
	8.2	4.9	0.1	5.8	0.2	4.9	0.1
	9.32	7.4	0.1	7.2	0.2	7.3	0.1
Metoprolol Tartrate (×10–5)	4.6	1.5	0.1	1.4	0.2	1.6	0.2
	4.98	2.7	0.2	2.5	0.2	2.6	0.2
	6.57	5.1	0.3	5.3	0.3	5.0	0.2
	8.2	8.0	0.1	7.5	0.3	8.0	0.4
	9.32	8.9	0.2	9.3	0.3	9.1	0.3
Norfloxacin (×10–6)	4.6	1.9	0.0	1.9	0.1	1.8	0.1
	4.98	2.3	0.1	2.2	0.1	2.2	0.1
	6.57	2.6	0.0	2.5	0.1	2.6	0.0
	8.2	2.5	0.1	2.5	0.1	2.6	0.1
	9.32	2.2	0.1	2.3	0.1	2.2	0.1
Ranitidine (×10–7)	4.6	1.6	0.1	1.6	0.3	1.6	0.2
	4.98	1.8	0.2	1.8	0.2	1.8	0.2
	6.57	3.2	0.1	3.1	0.1	3.2	0.2
	8.2	4.9	0.1	5.8	0.7	4.9	0.2
	9.32	5.5	0.2	5.5	0.3	5.4	0.4