Elemental analysis of tea leaves by atomic spectroscopic methods.
The total aluminium, magnesium, zinc, cadmium, iron, copper, calcium, potassium, and phosphorus contents of tea leaves collected in different countries were determined, as were the contents of these elements that could be extracted with hot distilled water. Atomic spectroscopic methods were used. Little difference in elemental composition was found for tea leaves from different sources. The [Mg]/[Al] ratio in the hot aqueous extracts was twice as high as in tea leaves. It is presumed that the aluminium in tea is present in a complex form which has a less unhealthy effect than its free ionic form.
Csikkel-Szolnoki
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Department of Inorganic and Analytical Chemistry, Attila József University, Dóm tér, Hungary.
Kiss
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Veres
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D006358:Hot Temperature; D008274:Magnesium / Q000032:analysis*; D018515:Plant Leaves; D013053:Spectrophotometry / Q000379:methods; D013054:Spectrophotometry, Atomic / Q000379:methods; D013662:Tea / Q000737:chemistry*; D014131:Trace Elements / Q000032:analysis*
D013662:Tea; D014131:Trace Elements; D008274:Magnesium