Table 2. Quantification of phytochemicals discovered in the free fractions of white, brown and black rice by UHPLC-Q-TOF-MS².

S. No	Sample Name	Retention Time (Min)	Adduct/Charge	Detected MS/MS Concentration (μg/mL)	Formula	Name
1	White rice	N/A	N/A	N/A	C6H8O6	Ascorbic acid
	Brown rice	1.05	[M+H]+	160.8
	Black rice	1.06	[M+H]+	244.3
2	White rice	16.08	[M−H]−	19.2	C9H8O3	p-Coumaric acid
	Brown rice	16.09	[M−H]−	26.7
	Black rice	16.09	[M−H]−	45.3
3	White rice	N/A	N/A	N/A	C15H14O6	Catechin
	Brown rice	N/A	N/A	N/A
	Black rice	10.11	[M−H]−	7
4	White rice	16.71	[M−H]−	158.3	C10H10O4	Ferulic acid
	Brown rice	16.73	[M−H]−	94
	Black rice	16.72	[M−H]−	83.9
5	White rice	19.34	[M+H]−	4.6	C15H10O7	Quercetin
	Brown rice	19.36	[M−H]−	1.9
	Black rice	19.34	[M−H]−	19.2

Nd-Not determined