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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.