Advancements in the rapid and sensitive analyses of tryptophan and its metabolites, by chromatography

.The state of the art of recent analytical method developments, applied on the one part on the reliable and reproducible quantitation of tryptophan in protein hydrolyzates, on the other part proper for the identification and quantification of tryptophan and its metabolites in biological matrices originating both from the indolyl- and kynurenine pathways. Analytical processes are evaluated and criticized on the basis of their advantages and shortcomings (selectivity, sensitivity, time/cost requirement, etc).