Evaluation of Macro- and Microelement Levels in Black Tea in View of Its Geographical Origin

被引：29

作者：

Brzezicha-Cirocka, Justyna ^{[1
]}

Grembecka, Magorzata ^{[1
]}

Ciesielski, Tomasz ^{[2
]}

Flaten, Trond Peder ^{[3
]}

Szefer, Piotr ^{[1
]}

机构：

[1] Med Univ Gdansk, Dept Food Sci, Al Gen J Hallera 107, PL-80416 Gdansk, Poland

[2] Norwegian Univ Sci & Technol, Dept Biol, NO-7491 Trondheim, Norway

[3] Norwegian Univ Sci & Technol, Dept Chem, NO-7491 Trondheim, Norway

来源：

BIOLOGICAL TRACE ELEMENT RESEARCH | 2017年 / 176卷 / 02期

关键词：

Factor analysis; Cluster analysis; RDA; PTWI; Black tea; FAAS; LINEAR DISCRIMINANT-ANALYSIS; CAMELLIA-SINENSIS VARIETIES; TRACE-ELEMENTS; METAL CONTENT; GREEN TEA; DIFFERENTIATION; CLASSIFICATION; FERTILIZERS; EXTRACTION; BEVERAGES;

D O I：

10.1007/s12011-016-0849-2

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

070307 [化学生物学]; 071010 [生物化学与分子生物学];

摘要：

The aim of this study was to evaluate the elemental composition of black tea samples and their infusions in view of their geographical origin. In total, 14 elements were analyzed, 13 (Ca, K, Mg, Na, Mn, Fe, Zn, Cu, Cr, Ni, Co, Cd, and Pb) by flame atomic absorption spectrometry, and P by UV-Vis spectrometry, after mineralization of samples. It was found that K was the most abundant macroelement in the analyzed samples, whereas among microelements, the highest concentration was found for Mn. Based on the obtained data, the percentage of elements leached into the infusions as well as the daily elemental intake from tea were calculated. The daily intake from tea was compared to the recommended daily allowances (RDAs), and the highest percentages of the RDAs were found for Mn (15 %) and Co (10 %). To study the relations between elemental composition and country of origin of samples, factor analysis and cluster analysis were applied. These multivariate techniques proved to be efficient tools able to differentiate samples according to their provenance as well as plantation within the common regions.

引用

页码：429 / 441

页数：13

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