Magnetic Solid Phase Extraction Applied to Food Analysis

Table 5

Experimental MSPE conditions used for analysis of drink samples.

Analyte	Amount of liquid sample	Magnetic material coating	Eluent volume	Eluent	Technique	Limit of detection	Recovery	References
Bisphenol A; (soft drinks)	3.0 mL	Tetradecanoate-coated magnetic nanoparticles	2.0 mL	Methanol	LC/MS/MS	7 ng/L	91–105%	[52]
Additives; (wine)	10.0 mL	Tetraethylenepentamine functionalized; Fe3O4 magnetic polymer			HPLC	0.06–0.15 mg/L	80.1–97.1%	[58]
Ochratoxin A; (coffee)	850 µL	Aptamer for ochratoxin, immobilized onto magnetic nanospheres	2.5 mL	95% acetonitrile (1% acetic acid)	LC-Fl	0.5 µg/kg	68.8–81.0%	[59]
Phenolic acids; (fruit juice)	5.0 mL	Fe3O4@ magnesium-aluminum layered double hydroxide	75.0 µL	Trifluoroacetic acid (8% v/v)	HPLC-UV-Vis	0.44–1.3 µg/L	81.2–109%	[61]
Dicofol; (tea)	10.0 mL	Fe3O4-molecularly imprinted microspheres; (mag-MIMs) chlorodiphenyltrichloroethane	4.0 mL	15% acetic acid; Dichloromethane	GC-ECD	0.05 ng/g	83.6–94.5%	[46]
Pyrethroids; (tea drinks)	150.0 mL	Polyaniline coated magnetic particles (Fe3O4/C/PANI microbowls)	3.0 mL	Methanol	UFLC-UV	0.025–0.032 ng/mL	72.1–118.4%	[60]
Organophosphorus pesticides; (tea drinks)	25.0 mL	Poly(ionic liquid) vinyltriethoxysilane-modified Fe3O4@SiO2	2.0 mL	Methanol	HPLC	0.01 µg/L	81.4–112.6%	[47]
Synthetic pigments	1.0 mL	Amino-functionalized low degrees of cross-linking magnetic polymer	—	—	UFLC-MS/MS	—	82.8–116.2%.	[48]
Silver, cadmium, copper, mercury, and lead; (tea leaves)	100.0 mL	Ethylene glycol; bismercaptoacetate modified 3-(trimethoxysilyl)-1-propanethiol; coated Fe3O4 nanoparticles	1.0 mL	Hydrochloric acid; 1 mol/L; (5% thiourea)	ICP-OES and AAS	0.01–0.09 ng/mL	95.4–99.8%	[37]

Packing additives, mycotoxin, aromatic compounds, pesticides, dyes, and Metal ions.