【摘要】 为了解全国茶叶主产区砖茶中F、Al、Ca、Mg、Cu、Zn、Fe、Mn等主要元素的含量水平,在内蒙、甘肃、新疆、青海、四川等习惯饮用砖茶的地区收集了33份茶叶主产区砖茶样品,用燃烧水解-氟离子选择电极法对其进行氟含量的测定,同时用ICP-AES测定了砖茶中Al、Ca、Mg、Cu、Zn、Fe、Mn等生命元素的含量,并探讨了砖茶中F与其他元素的关系及其影响因素。结果表明,33份砖茶的F含量均值为431.92mg·kg-1,Al、Ca、Mg、Cu、Zn、Fe、Mn含量分别是2237.88、6126.36、2163.01、19.00、29.73、633.88、1075.70mg·kg-1;不同产地砖茶氟含量的差异比较明显,其中氟含量最低为74.1mg·kg-1出现在云南省,最高为991.2mg·kg-1出现在四川省;不同品种的砖茶氟含量也存在较大的差异,其中沱茶氟最低,其后依次为普洱茶、饼茶、茯砖、米砖、黑砖、青砖,最高的为康砖。多元回归分析表明砖茶中F与Al、Mn含量呈显著正相关(P<0.05),与Zn呈显著负相关(P<0.05),提示砖茶中的这些元素可能会影响氟中毒病情。更多还原

【Abstract】 In order to determine the contents of F,Al,Ca,Mg,Cu,Zn,Fe and Mn in brick-teas from main producing areas in China and discuss the relationship between F and other major chemical elements of brick teas,33 samples of brick tea were collected from six provinces where minority nationalities were accustomed to drinking a large quantity of brick tea.F concentrations were determined by combustion hydrolysis-fluorine ion selective electrode method and the concentrations of Al,Ca,Mg,Cu,Zn,Fe and Mn in the brick teas were detected by inductively coupled plasma-atomic emission spectroscopy(ICP-AES) method.The results showed that the average concentration of F in brick teas was 431.92 mg·kg-1,and the concentrations of Al,Ca,Mg,Cu,Zn,Fe and Mn were 2 237.88,6126.36 mg·kg-1,2 163.01,19.00,29.73,633.88,1 075.70 mg·kg-1,respectively.F concentrations in brick teas ranged from the minimum 74.1 mg·kg-1 in Yunnan province to the maximum 991.2 mg·kg-1 in Sichuan province.Besides,there was a great difference among the various kinds of brick tea,and F concentrations followed the order:Kang brick tea>Green brick tea>Black brick tea>Mi brick tea>Fu brick tea>Chitsu ping tea>Puerh tea>Tuo tea.The concentrations of Al and Mn were significantly positive correlated with F concentration(P<0.05),but Zn was distinctly negative correlated with F(P<0.05),suggesting that brick-tea-type fluorosis may be influenced by the elements such as Al,Mn and Zn as well as F in brick teas.更多还原