Table 1.
Chromatographic and mass spectrometry characteristics of chlorophylls identified in green teas.
| Pigment | tR (Min) | Molecular formula | [M + H]+ (m/z) Calcd./Meas. | Mass Error (ppm) | mSigma | Main Product ions (m/z) |
|---|---|---|---|---|---|---|
| Chlorophyllide b | 2.2 | C35H32MgN4O6 | 625.2245/629.2248 | −0.4 | 26.5 | 569.2046 |
| Chlorophyllide a | 4.9 | C35H34MgN4O5 | 615.2452/615.2424 | 4.6 | 23.8 | 500.2147 |
| Pheophorbide b | 7.0 | C35H34N4O6 | 607.2551/607.2532 | 3.2 | 21.6 | 547.2332 |
| Pheophorbide a | 8.7 | C35H36N4O5 | 593.2758/593.2734 | 4.1 | 27.4 | 533.2523 |
| 132-hydroxy-chlorophyll b | 14.5 | C55H70MgN4O7 | 923.5168/923.5213 | −4.9 | 40.1 | 569.1837 |
| Chlorophyll b | 17.0 | C55H70MgN4O6 | 907.5219/907.5202 | 1.8 | 39.7 | 569.2073 |
| Chlorophyll b´ | 17.5 | C55H70MgN4O6 | 907.5219/907.5217 | 0.5 | 28.8 | 569.2025 |
| 132-hydroxy-chlorophyll a | 18.5 | C55H72MgN4O6 | 909.5375/909.5377 | −0.2 | 38.1 | 555.2257 |
| 132-hydroxy-pheophytin b | 19.2 | C55H72N4O7 | 901.5474/901.5436 | −4.21 | 25.7 | 607.2535 |
| Chlorophyll a | 19.8 | C55H72MgN4O5 | 893.5426/893.5468 | −4.7 | 34.5 | 555.2234 |
| Chlorophyll a´ | 20.1 | C55H72MgN4O5 | 893.5426/893.5421 | 0.6 | 25.4 | 555.2249 |
| 151-hydroxy-lactone-pheophytin a | 22.1 | C55H74N4O7 | 903.5630/903.5624 | 0.7 | 42.9 | 549.2510 |
| Pheophytin b | 26.2 | C53H72N4O6 | 885.5525/885.5515 | 1.1 | 12.8 | 547.2305 |
| 132-hydroxy-pheophytin a | 26.1 | C55H74N4O6 | 887.5681/887.56420 | 4.4 | 49.2 | 593.2723 |
| Pheophytin a | 28.6 | C55H74N4O5 | 871.5732/871.5723 | 1.0 | 13.0 | 593.2703 |
| Pheophytin a´ | 29.1 | C55H74N4O5 | 871.5732/871.5702 | −2.3 | 45.4 | 593.2711 |
| Pyropheophytin a | 30.7 | C53H72N4O3 | 813.5677/813.5696 | −2.3 | 9.3 | 535.2647 |