Table 5 Quantitative results for target organic acids in the ancient samples
Sample | Retention time (min) | Peak area response | Detected mass (m/Z) | Target organic acid | Quantitative results (ng/mL) |
|---|---|---|---|---|---|
M1:45 liquid residue | 3.713 | 51821188 | 224.07 | Lactic acid | 371.507 |
7.496 | 165731 | 419.10 | D-(-)-Tartaric acid | 0.375 | |
8.134 | 7106568 | 403.10 | Malic acid | 47.929 | |
8.605 | 5518540 | 387.11 | Succinic acid | 265.313 | |
N/F | N/F | N/F | Fumaric acid | N/F | |
9.737 | 11557001 | 359.08 | Oxalic acid | 1825.975 | |
10.663 | 372423 | 596.15 | Citric acid | 213.777 | |
M1:48 liquid residue | 3.713 | 51821188 | 224.07 | Lactic acid | 371.507 |
7.496 | 165731 | 419.10 | D-(-)-Tartaric acid | 0.375 | |
8.134 | 7106568 | 403.10 | Malic acid | 47.929 | |
8.605 | 5518540 | 387.11 | Succinic acid | 265.313 | |
N/F | N/F | N/F | Fumaric acid | N/F | |
9.737 | 11557001 | 359.08 | Oxalic acid | 1825.975 | |
10.663 | 372423 | 596.15 | Citric acid | 213.777 | |
The extract of M1:44 mud residue | 3.703 | 99687315 | 224.07 | Lactic acid | 714.66 |
7.497 | 138741 | 419.10 | D-(-)-Tartaric acid | 0.314 | |
8.134 | 2450600 | 403.10 | Malic acid | 16.459 | |
8.605 | 42719778 | 387.11 | Succinic acid | 2053.824 | |
9.404 | 544143 | 385.09 | Fumaric acid | 1.548 | |
9.740 | 6108079 | 359.08 | Oxalic acid | 965.06 | |
10.664 | 317987 | 596.15 | Citric acid | 182.529 |