Determination of Boron in Black and Herbal Teas
Determination of Boron (B) concentrations in black, chamomile, apple, rosehip and sage teas and their infusions were carried out by ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry). Microwave digestion method was used to determine all boron concentrations in teas. Additionally, tea infusions were performed according to ISO 3103 Standard Method. The extraction rate of Boron was estimated as the ratio of their concentrations in tea infusions to that in teas. The amount of realizing boron into black, chamomile, apple, rosehip and sage tea infusions and acceptable daily intake, for safety consumption of the teas, was compared. The maximum extraction rate was seen at the apple tea with a rate of 18.483% and the minimum extraction rate was seen at the sage tea with a value of only 0.497%. It is concluded that the boron daily intake percentages for these teas are in the safety consumption for people who drinks ten cups of tea daily.
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Document Type: Research Article
Publication date: December 1, 2013
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