• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>African Journal of Biotechnology >Determination of trace elements and heavy metals content of green and black tea varieties consumed in Iran
【24h】

Determination of trace elements and heavy metals content of green and black tea varieties consumed in Iran

机译：伊朗消费的绿茶和红茶品种的痕量元素和重金属含量的测定

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The aim of the present study was to determine the level of selected heavy metals in green and black tea varieties consumed in Iran. Samples were prepared with the acid digestion method and measured by polarography. The mean concentration of Zn, Cd, Pb and Cu was 0.505±1.632, 0.417±0.268, 0.325±0.249 and 4.151±3.739 mg/100 g for black tea, and 2.442±4.003, 0.284±0.198, 0.395±0.279 and 5.723±4.286 mg/100 g for green tea, respectively. Results showed no statistically significant difference among the samples with various flavors. Green tea samples were accompanied with high concentration of Zn, Pb and Cu and lower concentration of Cd in comparison with black tea samples. The mean concentration of Cu and Cd had no significant difference in the level of the reference article. Although the level of heavy metals in samples varied from non-detectable doses to extremely high concentration, the mean concentration of each element was in an acceptable range.
机译：本研究的目的是确定伊朗消费的绿茶和红茶品种中选定的重金属含量。用酸消解法制备样品并通过极谱法测量。红茶中Zn，Cd，Pb和Cu的平均浓度分别为0.505±1.632、0.417±0.268、0.325±0.249和4.151±3.739 mg / 100 g，以及2.442±4.003、0.284±0.198、0.395±0.279和5.723±绿茶分别为4.286毫克/ 100克。结果表明，各种口味的样品之间没有统计学上的显着差异。与红茶样品相比，绿茶样品伴有高浓度的Zn，Pb和Cu以及较低的Cd浓度。 Cu和Cd的平均浓度在参考品中没有显着差异。尽管样品中的重金属含量从不可检测的剂量变化到极高的浓度，但每种元素的平均浓度都在可接受的范围内。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号