Simultaneous Determination of Fifteen Polyphenols in Fruit Juice Using Ultrahigh-Performance Liquid Chromatography-Tandem Mass Spectrometry Combining Dispersive Liquid-Liquid Microextraction

Table 3

Relative recoveries and RSDs of polyphenols from the spiked mulberry juice sample.

Compounds	Content (μg/g)	RSD (%)		Spiked (μg/g)	Recovery (%)	Average recovery (%)
		Intraday	Interday
Gallic acid	1.73	3.0	5.3	5	128.0	109.1
				50	90.2
Neochlorogenic acid	397.72	2.8	4.4	5	104.3	102.4
				50	98.0
Catechin	10.43	4.3	7.5	5	106.1	105.7
				50	100.6
Chlorogenic acid	286.97	2.2	6.9	5	109.7	103.4
				50	100.4
p-Hydroxybenzoic acid	4.89	3.8	5.5	5	108.6	101.6
				50	99.5
Epicatechin	9.06	3.2	4.8	5	103.3	104.1
				50	99.8
Caffeic acid	9.49	4.3	8.2	5	107.3	103.6
				50	99.9
Syringic acid	6.04	3.2	4.9	5	109.6	116.3
				50	123.0
Ferulic acid	0.79	3.5	6.9	5	103.2	101.5
				50	99.8
Rutin	420.87	2.6	4.5	5	104.3	101.1
				50	98.0
Coumarin	1.00	3.5	5.1	5	95.7	101.2
				50	108.8
Resveratrol	—	3.1	5.3	5	93.1	102.8
				50	101.1
Phlorizin	0.11	3.7	8.1	5	98.0	97.1
				50	107.6
Quercitrin	0.31	3.6	4.9	5	90.5	103.6
				50	116.7
Cinnamic acid	0.99	4.5	5.8	5	97.9	96.9
				50	96.0