Table 3 Compounds identified by the present study by using GC-MS and LC-MS-QTOF in AEEA/CO2/H2O system at 135 °C
Compound | Abb. | MW (g/mol) | Structures | Analytical technique |
|---|---|---|---|---|
Diethanolamine | DEA | 105 |
| GC–MS LC-MS-QTOF |
1-Piperazineethanol | HEP | 126 |
| GC–MS LC-MS-QTOF |
1,4-Bis(2-hydroxyethyl)piperazine | BHEP | 130 |
| GC–MS LC-MS-QTOF |
2-Imidazolidinone | HEI | 86 |
| GC–MS |
1-(2-Hydroxyethyl)-2-imidazolidinone | HEIA | 130 |
| GC–MS LC-MS-QTOF |
2-((2-Aminoethyl)-(2-(2-aminoethylamino)-(ethylamino)ethanol | AAEEA* | 191 |
| – |
2-hydroxyethyl-2-oxazolidone | HEOD | 131 |
| GC–MS LC-MS-QTOF |
Succinimide | Succ | 99 |
| GC–MS |
N-Methylsuccinimide | MSucc | 113 |
| LC-MS-QTOF |
N,N’-Dimethyl-2-imidazolidinone | DMDZ | 114 |
| GC–MS |
4-[(2-Hydroxyethyl)(nitroso)amino]-1-butanol | HNAP | 162 |
| LC-MS-QTOF |
1-Nitroso-4-piperidinol | NP | 117 |
| LC-MS-QTOF |
4-[Butyl(nitroso)amino]-2-butanol | BNAB | 173 |
| LC-MS-QTOF |
N-(Butyl(nitroso)amino)methyl)acetamide | BNAMA | 173 |
| LC-MS-QTOF |
(3-Aminopropyl)morpholine | AMM | 144 |
| GC–MS |
N-(2-hydroxyethyl)-N -methylpiperazine | MPE | 144 |
| GC–MS |
1,4-Diformylpiperazine | DFP | 142 |
| GC–MS |
Homoserine | Hom | 119 |
| GC–MS |
1-Methyl-4-nitrosopiperazine | MNP | 129 |
| LC-MS-QTOF |
Pyrazole-1-ethanol | PE | 112 |
| LC-MS-QTOF |
1-Piperazineethanamine | AEP | 129 |
| GC–MS |
1-(2-(2-Hydroxyethoxy)ethyl) piperazine | HEEP | 174 |
| GC–MS LC-MS-Q TOF |
N-[2-[3-[N-Aziridyl]propyl]aminoethyl]piperazine | APAP | 212 |
| GC–MS |
Tetraethylenepentamine | TEP | 191 |
| GC–MS |
