| Amino acid analyzer or HPLC equipment with ion exchange column, device for ninhydrin, post column derivatization and photometric detector. |
| The amino acids were separated in this HPLC-system by ion exchange and detected after post-column derivatization with ninhydrin at 570 nm. |
| The photochemistry of ninhydrin in benzene and water was studied by laser flash photolysis and electron paramagnetic resonance. |
| In case ethambutol is present, stain the chromatoplate with ninhydrin for its detection. |
| The proline content was determined by reacting with ninhydrin in an acid medium. |
| Standards were visualized by ninhydrin reagent and the chromatogram containing phosphorylated proteins was autoradiographed. |
