[Separation and analysis of amino acids in secretion of psylla chinesis yang et li]

We used ion-exchange resin column chromatography to separate amino acids in secretion of Psylla Chinese Yang et Li and used capillary gas chromatography to analysis n-butyl-N-trifluoracetyl derivatives of the amino acids. Qualitative analysis was done by comparing with the standard amino acids and quantitative analysis by internal standard method. We determined thirteen amino acids in the secretion.