Sample | Eumelanin markers | Pheomelanin markers |
---|
PDCA (μg/g) | PTCA (μg/g) | TDCA (μg/g) | TTCA (μg/g) |
---|
M. edulis |
with periostracum | 0.04 | 0.15 | n.d. | n.d. |
without periostracum | < 0.01 | 0.05 | n.d. | n.d. |
N. pompilius | 0.01 | 0.03 | n.d. | n.d. |
C. nemoralis | 0.02 | 0.07 | 0.94 | 0.33 |
C. pharaonius | 0.11 | 0.02 | n.d. | n.d. |
S. adriatica | 0.50 | 0.06 | n.d. | n.d. |
- Values are not corrected for recovery. Recoveries following solid-phase extraction for PDCA, PTCA, TDCA and TTCA were 82, 76, 95 and 67%, respectively [44]. Values for N. pompilius and S. adriatica were determined following storage of sample extracts (32 weeks, − 20 °C). HPLC–MS data obtained prior to and following sample storage indicated that in the S. adriatica sample originally PTCA was the predominant marker, suggesting degradation of PTCA to PDCA. n.d., not detected