Synthesis of Modified Magnetic Graphene Oxide with Mesoporous Silica for Extraction of the Pharmaceutical Compound Quercetin

Table 4

Comparison of the proposed method with some different methods to determination of quercetin.

Methods	Sample	LOD (μg L^−1)	LDR (μg L^−1)	RSD (%)	Reference
GO/Fe3O4/HPLC-UV	Tea and urine	0.8 (μg L^−1)	3–1500 (μg L^−1)	≤5.6	[18]
d-MSPE^1/Fe3O4/SiO2/HPLC-UV	Fruit juices and vegetables	0.18 (μg L^−1)	0.6–500 (μg L^−1)	0.80	[19]
DLLME-SFO^2/UV-Vis	Apple, onion, and tomato	3.02 (μg L^−1)	15.10–151.00 (μg L^−1)	2.8	[20]
MIP-SPME^3/HPLC-UV	Black tea; Green tea; Coffee	9.94 (μg L^−1)	50–100.000 (μg L^−1)	2.3	[21]
MSPE (MACC^4)/UV-Vis	Onion	1.40 (μg L)	16.8–3358 (μg L^−1)	<10	[22]
SPME (CW/TPR^5); HPLC-UV	Food sample	9.94 (μg L^−1)	50–100 000 (μg L^−1)	2.3	[23]
MSPE (Fe3O4@GO@mSiO2)/UV-Vis	Spinach; Green pepper; Red onion; Dill weed	5.2 (μg L^−1)	20–800 (μg L^−1)	3.78	This work

¹Magnetic solid-phase extraction. ²Dispersive liquid-liquid microextraction based on the solidification of the coating organic. ³Molecularly imprinted polymer solid-phase microextraction. ⁴Magnetic-activated carbon cloth. ⁵Carbowax/templated resin.