Selective Preconcentration of Gold from Ore Samples

Table 4

Comparison of the proposed method with some studies based on SPE and determination of gold reported in literature.

Adsorbent	Medium	Eluent	D. M.	LOD	Matrix	Ref.
Octadecyl silica membrane discs modified with pentathia-15-crown-5	pH 4.5-7.00	0.5 mol L^−1 Sodium thiosulphate	FAAS	1.0 μg L^−1	Pharmaceutical and water samples	[23]
Diethyldithiocarbamate complex on Amberlite XAD-2000	0.5-2.5 mol L^−1 HNO3	1 mol L^−1 HNO3 in acetone	FAAS	16.6 μg	Environmental samples	[14]
1-phenyl-1,2-propanedione-2-complex on oximethiosemicarbazone SP Sephadex C25	pH 3	__	ICP-MS	1.6X10^−8-141X10^−8 mol L^−1	Minerals and natural water samples	[24]
Poly(N-(hydroxymethyl)methacylamide 0-1-allyl-thiourea) hydrogels	pH 0.5	0.8 mol L^−1 thioura in 3 mol L^−1 HCl	GFAAF	3 ng L^−1	Anode slime and geological samples	[25]
Dowex M 4195 chelating resin	pH 4	2 mol L^−1 H2SO4 + 2 mol L^−1 NH3	FAAS	1.61 μg L^−1	Water, soil and sediment samples	[26]
Multi-walled carbon nanotubes	pH 1-6	3% thiourea in 1 mol L^−1 HCl	FAAS	0.15 μg L^−1	Geological and water samples	[11]
2-pyridine-5-(4-tolyl)-1,3,4-oxadiazole complex on Amberlite XAD-4	0.5 mol/L HNO3	1 mol/L HCl in acetone	FAAS	1.03 μg L^−1	Environmental Samples	[27]
Polyethylenimine coated on Al2O3	pH 5.7	0.5 mol L^−1 thiourea then 1.0 mol/L HCl	FAAS	26.2 ng L^−1	Water Samples	[28]
Rubeanic acid complex on silica gel	pH 3.5	0.5 mol L^−1 thiourea then 1.0 mol L^−1 HCl	FAAS	0.80 ng mL^−1	Water Samples	[29]
Silica gel (SG-CIPrNTf2)	pH 2	__	ICP-OES	__	Water Samples	[30]
DEBT complex on Amberlite XAD-16	pH~1	0.2 mol L^−1 sodium thiosulphate	FAAS	0.025 μg mL^−1	Cu and Au Ores	This study

D.M.: detection method, Ref.: references. Matrix elimination method is used.