Simultaneous Determination of Sodium, Potassium, Manganese and Bromine in Tea by Standard Addition Neutron Activation Analysis |
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Authors: | Mohamad Khayatzadeh Mahani Mohamad Ghanadi Maragheh |
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Affiliation: | (1) Jaber Ibn Hayan Research Laboratories, NFCRS, NSTRI, P.O. Box 11365-3486, Tehran, Iran |
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Abstract: | Standard addition method was applied for neutron activation analysis of tea leaves. Four brands of tea leaves were analyzed
for its Na, K, Mn, and Br contents by this method. The Na, K, Mn, and Br concentrations were found to be in the 90–120 μg/g,
1.8–2.1% w/w, 150–500 and 3–7 μg/g ranges, respectively. The extraction efficiency of these elements, during the infusion, was calculated
by analysis of tea leaves before and after the infusion process. It was observed that about 90% of the Na, K, and Br elements
were extracted to water during the infusion process. The drinking tea is a rich source of Mn (despite of an extraction efficiency
of 50% for this element). |
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