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Table 1 Intermediates of the degradation of EV identified by HPLC-ESI-MS or GC-EI-MS

From: Determining the degradation efficiency and mechanisms of ethyl violet using HPLC-PDA-ESI-MS and GC-MS

HPLCpeaks Intermediates Abbreviation MS peaks (m/z) Absorption maximum (nm)
A N,N,N′,N′,N",N"-hexaethylpararosaniline EV 456.49 591.8
B N,N-diethyl-N′,N′-diethyl-N"-ethylpararosaniline DDEPR 428.88 585.6
C N,N-diethyl-N′-ethyl-N"-ethylpararosaniline DEEPR 400.21 571.9
D N,N-diethyl-N′,N′-diethylpararosaniline DDPR 400.19 573.2
E N-ethyl-N′-ethyl-N"-ethyl pararosaniline EEEPR 372.16 582.1
F N,N-diethyl-N′-ethylpararosaniline DEPR 372.21 569.7
G N-ethy-N′-ethylpararosaniline EEPR 344.19 565.6
H N,N-diethylpararosaniline DPR N/A 563.6
I N-ethylpararosaniline EPR N/A 561.7
J pararosaniline PR N/A N/A
a 4-(N,N-diethylamino)-4′-(N′,N′-diethylamino)benzophenone DDBP 325.45 371.6
b 4-(N,N-diethylamino)-4′-(N′-ethylamino)benzophenone DEBP 297.48 366.7
c 4-(N-ethylamino)-4′-(N′-ethylamino)benzophenone EEBP 269.31 365.5
d 4-(N,N-diethylamino)-4′-aminobenzophenone DBP 269.45 367.9
e 4-(N-ethylamino)-4′-aminobenzophenone EBP 241.18 352.6
f 4,4′-bis-aminobenzophenone BP 213.13 340.6
a 4-(N,N-diethylamino)-4′-(N′-hydroxyethyl-N′-ethylamino)benzophenone DHEBP 341.23 371.6
b 4-(N-hydroxyethyl-N-ethylamino)-4′-(N′-ethylamino)benzophenone HEEBP 313.08 369.1
α 4-(N,N-diethylamino)phenol DAP 166.25 290.4
β 4-(N-ethylamino)phenol EAP 137.15 282.1
γ 4-aminophenol AP 109.35 272.6
I N,N-diethylaminobenzene DBz 149 310.7
II N-ethylaminobenzene EBz 121 301.5
III Aminobenzene ABz 93 282.9
IV Acetamide AAm 59 N/A
V 2-Propenoic PAc 72 N/A
VI Acetic AAc 60 N/A
  1. Conditions: Zn foil, 0.01 gL-1 EV, reaction 36 h.