Table 1. Textural and Quantitative Parameters of Mesoporous Samples^a.

								pH-metric titration
	N2 ad/desorption isotherms			elemental analysis				direct	nack
sample	SBET (m2/g)	Vtotal (cm3/g)	d (nm)	N (%)	C (%)	H (%)	CL (mmol/g)	CL (mmol/g)
TEOS/EDTA	745	1.44	7.4					1.00
NaSi/NH2	700	0.99	6.6	1.74	9.01	3.05	1.26	0.14	0.98
NaSi/EDTA/NH2	710	1.03	6.6	1.06	8.57	2.83	0.51/0.25	0.33/0.46	0.60/0.1
TEOS/QAS	730	1.12	7.0	0.92	9.53	3.1	0.82

^aS_BET – Surface area calculated by the BET method; V_total – volume of adsorbed N₂ at p/p_o = 0.93; d – pore diameters calculated by BJH; C_L −concentration of functional groups.