title: Utilization of O-phthalaldehyde-sulphuric acid as a spray reagent in thin-layer chromatographic detection of some indolealkylamines and application to cutaneous secretion extracts of toad species.
abstract: An expansion of the utilisation of o-phthalaldehyde in sulphuric acid medium as spray reagent was carried out when tryptophan and some tryptophan-derived indole alkylamines such as tryptamine, serotonin, bufotenine, dehydrobufotenine and bufotenidine were examined by thin-layer chromatography. Rf-values and limits of detection ranging from 20 (serotonin) to 100 (dehydrobufotenine) ng per spot were found. Application of this reagent for the detection of some of these compounds was carried out, using either methanolic extracts or column chromatographic fractions of the skin secretion of the toads Bufo ictericus and Odontophrynus cultripes.
authors.affiliation: Departamento de Química, Universidade de Brasília, Brasília, DF 70910, Brazil.
authors.forename: C G
authors.initials: CG
authors.lastname: De Lima
authors.forename: T C
authors.initials: TC
authors.lastname: Pastore
authors.forename: C A
authors.initials: CA
authors.lastname: Schwartz
authors.forename: J S
authors.initials: JS
authors.lastname: Cruz
authors.forename: A
authors.initials: A
authors.lastname: Sebben