Magnetic Solid Phase Extraction as a Promising Technique for Fast Separation of Metallic Nanoparticles and Their Ionic Species: A Review of Recent Advances

Table 2

Magnetic adsorbents used for the separation and preconcentration of Au ions and AuNPs.

Analyte	Adsorbent	Detection method	(mL)	m (mg)	LOD (μg/L)	RSD (%)	Rec. (%)	Q m (mg/g)	Ref.
Au(III)	mGO@SiO2@PPy-PTh	FAAS	50	19	0.10	7.1	97–102	50	[57]
Au(III)	IIP@Fe3O4	FAAS	20	10	0.43	1.1	95–99	76	[75]
Au(III)	TREN-Fe3O4	ETAAS	100	10	0.50	NR	91–102	167	[54]
Au(III)	CEMNs	ETAAS	NR	NR	0.16	1.1	95–109	NR	[76]
Au(III)	mag-GO@MBT/SDS	ICP-OES	50	50	0.065	2.5	92–97	NR	[58]
Au(III)	Fe3O4@PTh	ICP-OES	100	60	2.0	3.3	88–109	NR	[60]
Au(III)	DPTH-MNPs	ICP-OES	50	50	0.62	2.7	92–109	6.20	[61]
Au(III)	DPTH@MGO	ICP-OES	50	50	0.60	2.6	91–104	9.25	[62]
Au(III)	Fe3O4@SiO2@IDA–Al^3+	ICP-MS	25	20	0.39	3.9	72–99	NR	[77]
AuNPs	Fe3O4@SiO2@IDA–Al^3+	ICP-MS	25	20	0.31	4.9	73–100	NR	[77]
Au(III)	Fe3O4NPs	ETAAS	5	0.5	19.7	2.5	53–107	NR	[74]
AuNPs	Fe3O4NPs	ETAAS	5	0.5	19.5	5.3	85–98	NR	[74]

ng/L; : sample volume; m: amount of adsorbent; LOD: limit of detection; RSD: relative standard deviation; Rec.: recovery; Q_m: adsorption capacity; Ref.: reference; NR: not reported.