Spcctrophotometry is used to determine contents of multicomponent aminoacid.The principle is a good addition of absorbance of color reaction of amino acid and 3-dioxohydrindene.

• 采用分光光度法来测量氨基酸组分的含量，其原理是利用氨基酸组分与茚三酮的显色反应具有很好的加合性这一特点。