贵州香椿芽的主要营养成分含量与重金属安全性

Content of Main Nutrition Components of Toona sinensis in Guizhou

为贵州香椿芽的开发利用提供参考,采用取样检测方法分析了普定香椿椿芽和镇宁香椿椿芽中的矿物质、维生素、蛋白质、膳食纤维和重金属含量。结果表明:普定椿芽和镇宁椿芽中的矿物质P元素含量分别达490mg/100g和517mg/100g,K元素分别为472mg/100g和408mg/100g,Na元素仅7.3mg/100g和4.9mg/100g;微量元素中的Fe元素含量分别为23.8mg/100g和23.1mg/100g,Zn元素分别为8.8mg/100g和8.5mg/100g;维生素中的VE含量分别为15.1mg/100g和19.9mg/100g,VB2含量分别为1.96mg/100g和0.51mg/100g,未检测到VA;重金属中的Hg含量分别为0.002mg/kg和0.004mg/kg,Cu含量分别为0.12mg/kg和0.11mg/kg,Pb含量分别为0.002mg/kg和0.003mg/kg,As含量分别为0.054mg/kg和0.053mg/kg。贵州香椿椿芽中P、K、Fe、Zn等矿物质元素含量多高于6种野生蔬菜,而重金属含量均小于6种野生蔬菜,也小于我国蔬菜食品中的重金属限量标准,其营养价值高,可安全食用。

The contents of mineral substances,vitamins,protein,dietary fiber and heavy metals in young T.sinensis leaves from Puding and Zhenning Counties were detected by sampling detection method to provide a reference for development and utilization of T.sinensis in Guizhou.The results showed that P,K and Na content in young T.sinensis leaves from Puding and Zhenning Counties were 490 mg/100g, 472 mg/100g and 7.3 mg/100g,and 517 mg/100g,408 mg/100g and 4.9 mg/100g respectively;The Fe, Zn and Cu content in young T.sinensis leaves from Puding and Zhenning Counties were 23.8mg/100g,8. 8 mg/100g and 1.2 mg/100g,and 23.1 mg/100g,8.5 mg/100g and 1.1 mg/100g separately;The VE and VB2 content in young T.sinensis leaves from Puding and Zhenning Counties were 15.1 mg/100g and 1.96 mg/100g,and 19.9 mg/100g and 0.51 mg/100g respectively;The Hg,Cu,Pb and As content in young T.sinensis leaves from Puding and Zhenning Counties were 0.002 mg/kg,0.12 mg/kg,0.002 mg/kg and 0.054 mg/kg,and 0.004 mg/kg,0.11 mg/kg,0.003 mg/kg and 0.053 mg/kg separately.The P,K,Fe and Zn content in young T.sinensis leaves with high nutrition value from Guizhou was higher than six wild vegetables but the heavy metal content was lower than the six wild vegetables and the limit standard of heavy metal content in vegetable and food in China.