Table 2. Degree of Suspension and Physical Stability of Colloidal Crosslinkers at Different pH Conditions.

system	pH	separation phase % (sole system)	separation phase % (with NS)	notes
PAM 9 wt % + AlAc 3 wt %	2.0 ± 0.5	0	0	rapid gel
	4.0 ± 0.5	18.4	12.17	more stability with NS
	6.0 ± 0.5	20.8	15.7	more stability with NS
	8.0 ± 0.5	100	30.8	no gel without NS
	10.0 ± 0.5	100	100	no gel
PAM 9 wt % + Al-AmAc 5 wt %	2.0 ± 0.5	0	0	rapid gel
	4.0 ± 0.5	0	0	rapid gel
	6.0 ± 0.5	0	0	stable with and without NS
	8.0 ± 0.5	23	0	more stability with NS
	10.0 ± 0.5	100	7.2	no gel without NS