Low Density Solvent-Based Dispersive Liquid-Liquid Microextraction for the Determination of Synthetic Antioxidants in Beverages by High-Performance Liquid Chromatography

Table 1

Analytical performance of the proposed method for the determination of antioxidants.

Analyte	LR^a; (µg mL^−1)	𝑅^2b	LOD^c; (ng mL^−1)	LOQ^d; (ng mL^−1)	RSD^e; (%)	EF ± SD^f	ER% ± SD^g
TBHQ	0.005–1	0.9980	0.85	2.82	1.0	31 ± 1	53 ± 1
BHA	0.005–1	0.9997	1.67	5.56	2.2	55 ± 2	96 ± 3
BHT	0.05–1	0.9975	2.73	9.09	5.2	40 ± 3	70 ± 5

aLinear range.
bSquare of correlation coefficient.
cLimits of detection (S/N = 3).
dLimits of quantification (S/N = 10).
eRelative standard deviation (C = 0.5 µg mL⁻¹, n = 3).
fMean enrichment factor ± standard deviation (n = 3).
gMean extraction recovery ± standard deviation (n = 3).