Abstract
An automatic analyzer of amino acids and lower peptides with 1-fluoro-2, 4-dinitro-benzene was constructed. The instrument could be used both for quantitative monitor-ing their chromatographic separation and for discontinuous analysis of previously fraction-collected samples with a high velocity. The maintenance was rather simple and only one gram of the reagent permitted continuous analysis over 30 hours. Samples after analysis could be recovered as their dinitrophenyl derivatives, easily.