Table 2.
LC/MS identification of the compositions of aqueous extracts from purslane at each molecular weight interval.
| No. | Classification | <1 kDa (POES) | 1–3 kDa | 3–10 kDa | >10 kDa (POEM) |
|---|---|---|---|---|---|
| 1 | Organic acids | Citric acid | Citric acid | - | Citric acid |
| 2 | Ferulic acid | Ferulic acid | Ferulic acid | - | |
| 3 | Azelaic acid | Azelaic acid | Azelaic acid | - | |
| 4 | - | Pantothenic acid | - | - | |
| 5 | - | - | Isocitric acid | - | |
| 6 | - | - | D-(-)-Quinic acid | - | |
| 7 | Nucleotide related substances |
Guanine | Guanine | Guanine | Guanine |
| 8 | Adenosine | Adenosine | Adenosine | Adenosine | |
| 9 | Uridine | Uridine | Uridine | - | |
| 10 | 2′-Deoxyadenosine | 2′-Deoxyadenosine | 2′-Deoxyadenosine | 2′-Deoxyadenosine | |
| 11 | Amino acids | L-Phenylalanine | L-Phenylalanine | L-Phenylalanine | L-Phenylalanine |
| 12 | L-Tryptophan | - | - | - | |
| 13 | - | D-(+)-Tryptophan | - | - | |
| 14 | - | - | DL-Tryptophan | DL-Tryptophan | |
| 15 | Alkaloids | Trigonelline | Trigonelline | Trigonelline | - |
ChemSpider, mzCloud, and mzVault were used for identification. The data screening took POEM as the reference, meet mzCloud score ≥70 points, and the top 50 peak area substances, and selected the other three groups based on this standard and peak area. After filtering, the comparison results of two other databases should be satisfied at the same time.