摘要
以贵妃枇杷花茶为原料,分析花茶水提取物的体外抗氧化能力,并检测其微生物学卫生指标。结果表明:贵妃枇杷花茶具有较强的抗氧化能力,总抗氧化能力达到1 126.4U·g-1,是茉莉花总抗氧化能力的2.18倍;清除羟自由基的能力为6.04×105 U·g-1,与绿茶清除羟自由基能力相当。研究还发现不同贮藏条件下贵妃枇杷花茶的抗氧化作用差异明显,其中低温条件下(4℃)60d内枇杷花茶维持较强的总抗氧化能力。贵妃枇杷花茶的菌落总数为500cfu·g-1,未检出大肠菌群,两者均达到目前已发布的行业和地方标准对代用茶微生物指标的要求。
In vitro antioxidant effect and in food sanitation for loquat flower tea were studied based on its water extract. The result showed that total antioxidant capacity of the tea was up to 1 126.4 U · g ^-1 and was 2.18 times of it in jasmine. Its ability in scavenging hydroxyl radicals was 6.04 × 10^5 U · g^-1 ,equivalent to it of green tea. The total antioxidant capacity of loquat tea changed with storage temperature and kept stably within 60 days under 4℃.The total bacterial colony number was 500 CFU · g^-1 and no Coli group detected ,which met the food sanitation requirements by trade standards and local standards for substitute tea.
出处
《福建农业学报》
CAS
北大核心
2015年第2期146-149,共4页
Fujian Journal of Agricultural Sciences
基金
农业部科研杰出人才计划及其创新团队
农业部热带作物种质资源保护项目(14RZZY-015)
福建省农业科学院青年基金项目(2014QA-2)
关键词
贵妃枇杷花茶
总抗氧化能力
清除羟自由基
菌落总数
大肠菌群
guifei Loquat flower
total antioxidant capacity
scavenging hydroxyl radical
total bacterial colony
coli group
