摘要
为探明荔枝果实中游离氨基酸组成及含量,采用AccQ.Tag柱前衍生反相高效液相色谱法测定紫娘喜、大丁香、黑叶、兰竹和甜眼荔枝果实中的17种游离氨基酸含量。结果表明:测定方法重现性好,精密度高;甜眼果实中的人体必需氨基酸含量占氨基酸总量的36.4%,人体必需氨基酸含量与非必需氨基酸含量之比为0.57,较接近理想蛋白质的标准要求;紫娘喜、大丁香、黑叶、兰竹和甜眼荔枝果实均含有丰富的药效氨基酸、鲜味氨基酸、甜味氨基酸以及少量的芳香族氨基酸,但不同品种间的含量及比例差异较大。因此,不同荔枝品种的口感和风味明显不同。
An AccQ·tag precolumn derivatization and reversed phase HPLC method was presented to determine the contents of 17 free amino acids in litchi fruits from 5 different cultivars,Ziniangxi,Dadingxiang,Heiye,Lanzhu and Tianyan.The method proved highly reproducible and precise.The ratio of essential amino acids to total amino acids was 36.4% and to non-essential amino acids 0.57 in Tianyan,indicating good agreement with the ideal human protein requirements.The five litchi cultivars were all rich in medicinal,umami and sweet amino acids with a difference in their contents and small amounts of several aromatic amino acids were also found.Therefore,different litchi cultivars distinctly differ in taste and flavor.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第16期249-252,共4页
Food Science
基金
国家现代农业产业技术体系建设专项(nycytx-32)
国际植物营养研究所资助项目
