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

Table 3

Spiked recoveries of antioxidants in beverage samples by the proposed method.

Sample	Added; (ng/mL)	TBHQ		BHA		BHT
		Found ± SD; (ng/mL)	RR (%)	Found ± SD; (ng/mL)	RR (%)	Found ± SD; (ng/mL)	RR (%)
Tap water	50	47.3 ± 2.2	95	47.8 ± 1.3	96	44.3 ± 4.6	89
	250	237.7 ± 9.8	95	244.1 ± 8.3	98	245.8 ± 4.8	99
Mineral water	50	50.9 ± 1.2	102	50.1 ± 2.5	100	49.2 ± 1.3	98
	250	240.8 ± 2.7	96	241.4 ± 6.0	97	247.1 ± 12.3	99
Cherry juice	50	47.7 ± 3.0	95	39.9 ± 2.9	80	43.4 ± 2.4	87
	250	254.5 ± 8.9	102	241.6 ± 6.8	97	240.9 ± 6.7	96
Apple juice	50	44.2 ± 2.4	88	46.2 ± 1.5	92	46.8 ± 2.9	94
	250	213.4 ± 10.2	85	233.8 ± 11.6	94	241.7 ± 8.1	97
Mixed fruit juice	50	39.1 ± 2.5	78	46.1 ± 1.1	92	43.8 ± 2.6	88
	250	205.6 ± 8.8	82	240.3 ± 6.9	96	244.4 ± 7.7	98

RR: relative recovery.
SD: standard deviation (𝑛=3).