Comparative Analysis of Amino Acids Content in Homemade Red Grape Wine and in Foreign Red Grape Wine

Amino acids content in 16 kinds of red grape wine products (including homemade and foreign) was measured by Hitachi L-8800 amino acid automatic analyzer and the chromatographic conditions were as follows: standard column was 4.6 mm× 60 mm, temperature of reaction column was at 57.0 ℃, and the reactor temperature was at 135.0 ℃. The results showed that red grape wine contains 17 kinds of amino acids such as proline, threonine and lysine etc., and the content of proline is the highest (54.8～90.6 % of the total 17 amino acids). In addition, the comparative study of amino acids in 7 homemade grape wine products and in 9 foreign grape wine products showed that their compositions and their content are very close.