Table 2.

Concentrations of non‐methoxylated flavonoids, methoxylated flavonoids, and limonoids in wastewater.

Compound	Concentration (mg/L)
Non‐methoxylated flavonoid
Vicenin 2	<0.10
Naringin glucoside	<0.10
Naringin	0.27
Limonoid
Limonin‐17‐β‐d‐glucoside	2.26
Limonin	0.19
Deacetylnomilinic acid glucoside	<0.10
Deacetylnomilin glucopiranoside	0.12
Nomilin glucopiranoside	0.19
Nomilinic acid glucoside	1.24
Methoxylated flavonoid
Hesperidin	0.43
Neohesperidin	<0.10
Demethylnobiletin	4.19
Tangeretin	43.26
Methoxytangeretin	11.47
Nobiletin	46.95
Tetramethoxyflavone	8.42
Methoxynobiletin	24.35
Diosmetin diglucoside	<0.10