aldehyde reaction

(redirected from Ehrlich reaction)

al·de·hyde re·ac·tion

the reaction of the indole derivatives with aromatic aldehydes; for example, tryptophan and p-dimethylaminobenzaldehyde in H2SO4 give a red-violet color useful in assaying proteins for tryptophan content.
Synonym(s): Ehrlich reaction
References in periodicals archive ?
Serial dilutions were made with nonporphyric urine samples and electronic absorption spectra (450-600 nm) of the Ehrlich reaction products were obtained with a Pye-Unicam SP1800 double-beam recording spectrophotometer.
Columns are generally eluted with at least 3 column volumes, but only 2 mL of eluate is used in the Ehrlich reaction.