Table 2.

The summary of the extracted South African plant samples, their name, extracted part, quantified quercetin amount in a sample, and results used for the quercetin confirmation in the sample.

Sample No	Latin name	Plant part	UHPLC-MS/MS analysis		UHPLC-HRMS analysis		Confirmation	Concentration Per 1 g Sample (ng)
			Concentration (ng/mL)	Deviation of ion ratios (%)	Accuracy of precursor ions (ppm/mDa)	Detection of product ions (m/z 273.0405, 271.0243, 121.0295)
13	Agapanthus praecox/ Amaryllidaceae	bulb	2097.7	2.2	−0.3/−0.09	+	YES	34,402.3
15	Allium cepa/ Amaryllidaceae	Bulb	367.4	3.2	−1.3/−0.39	+	YES	5504.9
16	Cydonia oblonga/ Rosaceae	Fruit	68.19	−0.3	−0.3/−0.09	+	YES	1118.3
5	Eucomis pole-evansii/ Asparagaceae	Bulb	17.23	−0.2	−2.7/−0.81	+	YES	265.6
4	Drimia robusta / Hyacinthaceae	Bulb	16.20	2.2	−3.3/−0.99	+	YES	252.7
3	Scadoxus puniceus/ Amaryllidaceae	Bulb	9.34	−2.3	−2.7/−0.81	+	YES	160.6
1	Ornithogalum longibracteatum/ Liliaceae	Bulb	2.14	−5.8	−4.7/−1.41	+	YES	33.4
8	Boophone hemanthoides/ Amaryllidaceae	Bulb	3.25	−8.3	15.9/4.79	−	MS/MS	52.0
14	Kigelia africana/ Bignoniaceae	Fruit	2.01	11.6	−5.7/−1.71	−	MS/MS	32.6
6	Albuca nelsonii/ Hyacinthaceae	Bulb	1.39	−0.8	−7.6/−2.29	−	MS/MS	22.8
11	Haemanthus albiflos	Bulb	1.30	14.7	–	−	MS/MS	30.0
7	Tulbaghia violacea/ Amaryllidaceae	Bulb	< LOQ	–	–	−	NO	–
9	Bowiea volubilis/ Amaryllidaceae	Bulb	< LOQ	–	–	−	NO	–
12	Clivia miniata/ Amaryllidaceae	Bulb	< LOQ	–	–	−	NO	–
10	Cyrtanthus obliquus / Amaryllidaceae	Bulb	< LOQ	–	–	−	NO	–
2	Merwilla plumbea / Hyacinthaceae	Bulb	< LOQ	–	–	−	NO	–

ppm parts per million

UHPLC-MS/MS method: LOQ 1 ng/ml,

Designation in column “Confirmation”: YES—the quercetin was confirmed by all three criteria (ion ratio, mass accuracy, and typical fragmentation), MS/MS—the quercetin was confirmed only by the UHPLC-MS/MS method based on the deviation of ion ratios, NO—the quercetin was not confirmed