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. Author manuscript; available in PMC: 2013 Sep 4.
Published in final edited form as: J Agric Food Chem. 2007 Jan 27;55(4):1084–1096. doi: 10.1021/jf062431s

Table 3.

Phenolic Compounds in Navel Orange Peel

peak tR
(m i n)
[M + H]+/
[M - H]−
(m/z)
[A + H]+/[A - H]−
and other NI
ions (m/z)
UV/vis Abs
λmax (nm)
identification
hydroxycinnamatesb
P1 7.17 −/355 −/209, 191, 163 230, 312 p-coumarate
P2 7.94 −/355 −/209, 191, 163 230, 314 p-coumarate
P3 8.58 −/385 −/209, 191, 163 238, 298 sh, 326 ferulate
P4 9.25 −/355 −/209, 191, 163 230, 314 p-coumarate
P5 9.54 −/355 −/209, 191, 163 230, 314 p-coumarate
P6 10.82 −/355 −/209, 191, 163 230, 314 p-coumarate
P7 11.18 −/385 −/209, 193, 191 238, 298 sh, 326 ferulate
P8 11.73 −/385 −/209, 193, 191 238, 298 sh, 328 ferulate
P9 12.56 −/385 −/209, 193, 191 238, 298 sh, 328 ferulate
P10 15.22 −/355, 385 −/209, 193, 191, 163 238, 298 sh, 330 p-coumarate + ferulate
P11 15.38 −/385 −/209, 193, 191 240, 298 h, 328 ferulate
hydroxycinnamic acids detected in the alkaline hydrolyzed extract
P12 22.30 −/163 224, 310 p-coumaric acida
P13 24.82 −/223 236,324 sinapic acida
P14 25.22 −/193 236 sh, 324 ferulic acida,c
glycosylated flavones (group I)
O1 15.30 595/– 475, 355/– 272, 334 apigenin 6,8-di-C-glucoside
O2 16.50 625/– 505, 385/– 256, 272, 348 diosmetin 6,8-di-C-glucoside
O5 23.51 433/– 313/– 270, 338 apigenin 6-C-glucosidea
O6 25.00 463/– 343/– 270, 338 diosmetin 6-C-glucoside
O7 25.51 595/593 287/285 256, 268, 350 luteolin 7-O-glucoside
O9 31.78 609/607 463, 301/299 252, 268, 348 diosmetin 7-O-rutinosidea
O10 30.68 609/607 463, 301/299 252, 268, 348 diosmetin 7-O-neohesperidosidea
glycosylated flavanones (group IV)
O3 17.26 743/741 581, 419, 273/271 286, 336 sh naringenin triglycoside
O4 22.28 773/771 611, 449, 303/301 286, 336 sh hesperitin triglycoside
O8 30.50 581/579 419, 273/271 284, 336 sh naringenin 7-O-rutinosidea
O11 33.87 611/609 449, 303/301 284, 336 sh hesperidina
O12 46.87 595/593 433, 287/285 284, 336 sh didymina
polymethoxyflavones (group 1)
O13 57.30 373/– 268 sh, 330 sinengetina
O14 59.41 403/– 224, 334 nobiletina
O15 60.56 403/– 268, 302 quercetigenin hexamethyl ether
O16 61.16 343/– 272, 302 tetramethylscutellarein
O17 62.62 433/– 268 sh, 342 heptamethoxyflavone
O18 64.33 373/– 226, 330 tangeretina
a

Identification with standard.

b

Over half of the hydroxycinnamates were first detected in this plant.

c

At the same LC condition, the retention time of isoferulic acid is 27.42 min.

HHS Vulnerability Disclosure