Table 3.

The average velocity of aggregate sedimentation in the Cr₂O₃ suspension formed in the absence and presence of ionic polyamino acids (at 15 h)

System	V (μm/min)
pH	4.0	7.6	10
Cr2O3–NaCl	0.439	0.325	41.52
Cr2O3–ASP 6,800	1.844	1.047	0.892
Cr2O3–ASP 27,000	0.653	0.906	0.696
Cr2O3–LYS 4,900	1.264	1.394	42.91
Cr2O3–LYS 33,000	1.407	1.971	2.268