Table 2.
Tentative assignment | Molecular formula | Negative ion mode | Positive ion mode | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Detected ion (m/z) | Grass | Chewed grass | Grasshoppers | Excrements | Soil (control) | Soil with grasshoppers | Detected ion (m/z) | Grass | Chewed grass | Grasshoppers | Excrements | Soil (control) | Soil with grasshoppers | ||
Dehydroquinic acid | C7H10O6 | [M−H]−189 | − | − | − | − | − | − | [M+Na]+213 | x | x | x | x | x | x |
Quinic acid | C7H12O6 | [M−H]−191 | x | x | − | − | − | − | [M+Na]+215 | x | x | x | x | − | − |
Apigenin | C15H10O5 | [M−H]−269 | x | x | x | x | − | − | [M+H]+271 | x | x | − | − | − | − |
Luteolin | C15H10O6 | [M−H]−285 | x | x | x | x | − | − | [M+Na]+309 | x | x | x | x | x | x |
Tricin | C17H14O7 | [M−H]−329 | x | x | − | − | − | − | [M+H]+331 | x | x | − | − | − | − |
Rosmarinic acid | C18H16O8 | [M−H]−359 | x | x | − | − | − | − | [M+Na]+383 | x | x | − | − | − | − |