Table 3.

Effect of kaolin concentration on the equilibrium concentration (C_e) of metronidazole (40 mg/20 ml) of (a) 0.1 M HCl, pH 1.2 and (b) phosphate buffer, pH 6.8, at 37 °C.

Kaolin concentration (g% w/v)	Ce (mg%)
	a	b
2.5	118.83	63.13
5.0	168.7	55.70
10	98.67	59.94
20	115.12	54.64