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  • Title: [Determination of nine life elements in brick tea by ICP-AES].
    Author: Li HL, Wang LZ, Wang WY.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 2005 Aug; 25(8):1344-6. PubMed ID: 16329518.
    Abstract:
    ICP-AES was used for the direct determination of nine life elements (Ca, Mg, K, Al, P, Cu, Zn, Fe and Mn) in brick tea. The RSDs of the method were between 2.11% and 8.68%, and the analytical results of the tea reference samples were consistent with the certified values. The method was simple and accuracy. The analytical results of brick tea were compared with those of the ordinary leaf tea (green tea, scent tea and oolong tea). The Al, Fe, Mn, Ca and Mg contents of brick tea were about 5.78, 3.26, 2.19, 2.11 and 1.64 times higher than those of the ordinary leaf tea respectively. The P, K, Zn and Cu contents of brick tea were 48.70%, 85.68%, 78.19% and 98.78% times lower than those of the ordinary leaf tea respectively.
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