不同品种绿茶中矿物质含量的比较研究

Anila Bashir, M. Sajid, F. S. Hamid, A. Waheed, Madiha Bashir, H. Shah, N. Khan, Seemab Ali, Naveed Ahmed
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引用次数: 2

摘要

茶树叶片中不同浓度组成的矿物质含量对人体的营养和健康起着至关重要的作用。在本研究中,在巴基斯坦Mansehra Shinkiari的国家茶叶和高价值作物研究所(NTHRI),使用当地加工的三种不同的绿茶品种P3、P5和P9进行矿物质含量的测定。采用原子吸收分光光度计、火焰光度计和Kjehldal仪对所收集的茶叶样品进行了矿物质含量的测定。茶叶样品的矿物组成按以下数量顺序确定:与其他矿物相比,所有茶叶样品的氮含量(37300至41380 mg/L),钙含量(515.6至522.1 mg/L)和磷含量(742至1220 mg/L)均较高。钴(Co)、钼(Mo)、钠(Na)、锌(Zn)、镍(Ni)和铜(Cu)在P3品种中含量最高,在P5品种中含量最低。相反,钙(Ca)、钾(K)和铅(Pb)含量在P5最高,在P3最低。这项研究表明,不同品种的绿茶中矿物质元素的含量不同于允许的水平,但对茶树中的矿物质元素含量进行监测对于未来的风险测量是必要的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Study of Mineral Content in Different Varieties of Green Tea
Camellia sinensis L. leaves composed of different concentrations of mineral contents play a vital role in human nutrition and health. In this study, locally processed three different green tea varieties i.e. P3, P5 and P9 were used for mineral content determination at National Tea and High Value Crops Research Institute (NTHRI), Shinkiari, Mansehra, Pakistan. Atomic absorption spectrophotometer, flame photometer and Kjehldal apparatus were used for the determination of mineral concentration in all the collected tea samples. Mineral composition of tea samples were identified in the following quantity order: high level of nitrogen (37300 to 41380 mg/L), calcium (515.6 to 522.1 mg/L) and phosphorus (742 to 1220 mg/L) were observed in all tea samples compared to other minerals. Cobalt (Co), molybdenum (Mo), sodium (Na), zinc (Zn), nickel (Ni) and copper (Cu) were highest in P3, while least amount was identified in P5, variety. On the contrary, calcium (Ca), potassium (K) and lead (Pb) contents were maximum in P5, while minimum were in P3. This study revealed that the levels of mineral elements in different varieties of green tea vary from the permissible level but the monitoring of their levels in tea plant is obligatory for future risk measurements.  
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