The proline content was determined by reacting with ninhydrin in an acid medium. |
Measure out 225 mL of ethanol and add to ninhydrin. |
The photochemistry of ninhydrin in benzene and water was studied by laser flash photolysis and electron paramagnetic resonance. |
Fixed-dose combination products containing also ethambutol would require staining with ninhydrin solution as this drug cannot be detected with UV light of any wavelenght whatsoever. |
Amino acid analyzer or HPLC equipment with ion exchange column, device for ninhydrin, post column derivatization and photometric detector. |
In case ethambutol is present, stain the chromatoplate with ninhydrin for its detection. |