Study on Pretreatment Method for Determination of Free Aminoacids in Tea

Three improved measures,i.e.increase of sampling amount,adjustment of extractive order for removing the interferential substrances and treating temperature were employed in this study based on classic extractive method.Thus a new pretreatment method for determining free aminoacids in tea-improved extractive method has been developed.The experimental results showed that,this method has high gathering rate and repeatability,less interfernce and is suitable for type 835-50 Auto-aminoacid Analyser.