Abstract
The determination of amino acids has been achieved by reverse-phase high-pressure liquid chromatography of their dinitrophenyl derivatives. The methods developed permit the quantitation of all amino acids commonly encountered in a protein hydrolysate and the effect of various parameters on this separation was systematically evaluated. The procedure eliminates the need for specialized postcolumn equipment as employed in conventional amino acid analysis and can be obtained by a simple gradient high-pressure chromatograph. The sensitivity obtained is comparable to that available by methods in common usage, being able to determine amino acids quantitatively in the low picomole range.
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