对新疆产高酸苹果—“洪勋1 号( 红肉) ”进行系统研究，发现其可滴定酸度为1. 31%，总酚和花青素含量依次为果皮＞ 果渣＞ 全果( 总酚含量为( 2026. 88 ±28. 30) mg /kg;花青素含量为( 244. 92 ± 13. 88) mg /kg) ＞ 果肉． 采用高效液相色谱法对高酸苹果多酚进行分离鉴定，共鉴定出10 种多酚类化合物，包括绿原酸、根皮苷、表儿茶素、阿魏酸、杨梅酮、儿茶素、香草酸、p-香豆酸、芦丁和咖啡酸，全果中以绿原酸( 391. 19 ± 18. 37) mg /kg) 、表儿茶素( 698. 82 ± 17. 21) mg /kg) 和儿茶素( 570. 30 ± 9. 21) mg /kg) 为主． 采用DPPH 自由基清除法、氧自由基吸收能力法、2，2-偶氮二异丁基脒二盐酸盐( AAPH) 损伤人血红细胞氧化模型评价苹果各部位的抗氧化活性与抗溶血活性，结果表明: 高酸苹果的皮、肉、渣、全果均具有较强的抗氧化活性，抗溶血能力依次为果皮＞ 果渣＞ 全果＞ 果肉． 研究表明，高酸苹果值得深度开发加工为高营养价值的产品．

The composition of a kind of high acid apple from Xinjiang,China,namely Hongxun Ⅰ ( red flesh) ,was determined,finding that the high acid apple is of a titratable acidity of 1. 31%,a total phenolics and anthocyanins content in an order of peel ＞ pomace ＞ whole fruit ( with a total phenolics content of ( 2026. 88 ±28. 30) mg /kg and a total anthocyanins content of ( 244. 92 ± 13. 88) mg /kg) ＞ flesh.Then,ten phenolic compounds including chlorogenic acid,phlorizin,epicatechin,ferulic acid,myricetin,catechins,vanillic acid,p-coumaric acid,rutin and caffeic acid were indentified by means of high-performance liquid chromatography,finding that the high acid apple is rich in chlorogenic acid ( ( 391. 19 ± 18. 37) mg /kg) ,epicatechin ( ( 698. 82 ± 17. 21) mg /kg) and catechins ( ( 570. 30 ± 9. 21) mg /kg) .Moreover,the antioxidant and anti-hemolysis activities of the high acid apple were determined by means of DPPH radical scavenging activity assay,oxygen radical absorption capacity assay and AAPH-induced oxidative damage human erythrocytes model,finding that the peel,flesh,pomace and whole fruit of the high acid apple all exhibit excellent antioxidant activity and that the anti-hemolysis activities are indicative of the following order: peel ＞ pomace ＞ whole fruit ＞ flesh.All these above-mentioned statements indicate that,as a valuable product,high acid apple is worth processing and developing.