不同品种梨汁中糖和有机酸含量测定及相关性分析

利用反相高效液相色谱法测定了不同品种梨汁中的糖和有机酸含量，并应用SAS统计软件对各种糖和有机酸含量之间的相关性进行了分析。结果表明，梨汁中的糖主要为果糖、葡萄糖和蔗糖，其中果糖和葡萄糖含量较高；不同品种梨汁中果糖、葡萄糖及总可溶性糖含量变异较小，相对稳定，果糖与葡萄糖、总可溶性糖之间表现出显著的相关性；有机酸有苹果酸、柠檬酸、琥珀酸、莽草酸、酒石酸、奎宁酸、乳酸和富马酸，以苹果酸含量最高；不同品种梨汁中各有机酸含量差别较大，其中琥珀酸与乳酸、富马酸，莽草酸与柠檬酸、奎宁酸的含量之间表现出极显著的相关性。

Study on Determination and Correlation of Soluble Sugars and Organic Acids in Peer Juice from Different Cultivars

The contents of sugars and organic acids in pear juice from different cultivars were determined by reverse phase HPLC. The correlations among different sugars and organic acids were analyzed using SAS statistic software. The results showed that the main soluble sugars were fructose, glucose and sucrose. The contents of fructose and glucose were higer than other soluble sugars in peer juice. The contents of fructose, glucose and whole soluble sugars were steady in peer juice, and there were notable correlation between fructose and glucose, fructose and whole soluble sugar. The main organic acids in peer juice included malic acid, citric acid, succinic acid, shikimic acid, tartaric acid, quinic acid, lactic acid and fumaric acid. The content of malic acid as 1.14-3. 09 g/L was the highest in peer juice. Moreover, there were notable differences among the contents of organic acids in peer juices from different cultivars. There were definitely positive correlation between succinic acid and lactic acid,succinic acid and fumaric acid. The same situation existed between shikimic acid and citric acid, as well as quinic acid.