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Amino acids as butyl esters and their molecular ions. Additional amino acids can be detected and quantified with the matching stable-isotopic labeled standards.
| Target amino acid | [M+H]+/[M+H]+ Internal standard as butylesters |
|---|---|
| Alanine | 146/150 |
| Arginine | 231/236 |
| Aspartic Acid | 246/249 |
| Citrulline | 232/234 |
| Glutamic acid | 260/263 |
| Glycine | 132/134 |
| Leucine/Isoleucine | 188/191 |
| Methionine | 206/209 |
| Ornithine | 189/191 |
| Phenylalanine | 222/228 |
| Tyrosine | 238/244 |
| Valine | 174/182 |
