Table 4.
Tandem-mass spectrometry (MS) analysis of selected 28-carbon containing masses
| Marker nominal neutral mass | 446 | 448 | 450 | 464 | 466 | 468 | |
|---|---|---|---|---|---|---|---|
| [M-H]-(%) | 445 (100%) | 447 (52%) | 449 (92%) | 463 (70%) | 465 (100%) | 467 (100%) | |
| Chain cut ions (%) | 223 (18%) | 277 (11%) | 171 (7%) | 277 (10%) | 241 (7%) | 187 (12%) | |
| 222 (11%) | 239 (5%) | 127 (9%) | 241 (68%) | 223 (3%) | 169 (3%) | ||
| 207 (3%) | 207 (3%) | 125 (12%) | 223 (15%) | 215 (2%) | 141 (2%) | ||
| 205 (11%) | 169 (6%) | 113 (38%) | 185 (8%) | 185 (4%) | 113 (4%) | ||
| 113 (5%) | 113 (25%) | 167 (4%) | 167 (4%) | ||||
| 113 (28%) | 113 (7%) | ||||||
| Peripheral cut ions (%) | Loss of H2O | 427 (50%) | 429 (35%) | 431 (80%) | 445 (46%) | 447 (45%) | 449 (84%) |
| Loss of 2H2O | 409 (8%) | 411 (6%) | 413 (13%) | 427 (6%) | 429 (8%) | 431 (10%) | |
| Loss of CO2 | 401 (95%) | 403 (100%) | 405 (100%) | 419 (100%) | 421 (45%) | 423 (25%) | |
| Loss of CO2and H2O | 383 (28%) | 385 (15%) | 387 (32%) | 401 (24%) | 403 (20%) | 405 (13%) | |
| *Loss of CO2and 2H2O | 365 | 367 | 369 | 383 (2%) | 385 (4%) | 387 (3%) | |
| *Loss of 3H2O | 409 | 411 | 413 | ||||
| Secondary daughter ions (%) | 357 (5%) | 331 (3%) | 307 (5%) | 347 (5%) | 349 (4%) | 349 (1%) | |
| 329 (11%) | 305 (3%) | 291 (7%) | 319 (5%) | 321 (2%) | 323 (2%) | ||
| 261 (3%) | 359 (2%) | 295 (5%) | 295 (6%) | 297 (3%) | 309 (2%) | ||
| 241 (3%) | 289 (3%) | 281 (5%) | 281 (5%) | 281 (3%) | 297 (6%) | ||
| 233 (5%) | 245 (3%) | 279 (9%) | 279 (5%) | 279 (15%) | 281 (3%) | ||
| 207 (11%) | 125 (6%) | 263 (7%) | 267 (5%) | 261 (3%) | 279 (5%) | ||
| 177 (11%) | 123 (3%) | 261 (5%) | 249 (6%) | 251 (3%) | 269 (5%) | ||
| 123 (5%) | 121 (3%) | 169 (5%) | 195 (10%) | 195 (2%) | 263 (8%) | ||
| 109 (11%) | 111 (5%) | 111 (5%) | 141 (1%) | 141 (2%) | 251 (4%) | ||
| 97 (16%) | 97 (5%) | 97 (8%) | 127 (9%) | 123 (4%) | 243 (2%) | ||
| 83 (11%) | 59 (3%) | 83 (5%) | 121 (6%) | 113 (5%) | 215 (4%) | ||
| 59 (11%) | 59 (1%) | 101 (6%) | 101 (3%) | 213 (3%) | |||
| 97 (4%) | 97 (32%) | 197 (3%) | |||||
| 83 (2%) | 83 (2%) | 125 (4%) | |||||
| 59 (2%) | 59 (2%) | 111 (3%) | |||||
| 98 (2%) | |||||||
| 57 (1%) | |||||||
*Ions m ay have been obtained from MS3 experiments