Assessment of Heavy Metals in Tea Brands in Eastern Region, Saudi Arabia
Journal Title: Saudi Journal of Medical and Pharmaceutical Sciences - Year 2018, Vol 4, Issue 10
Abstract
Tea is common drinks in Saudi Arabia, as in the overall world for its desirable aroma, taste and putative positive physiological functions. According to recent estimates by FAO, approximately 5.35 million tons of tea were produced in the year 2013 with a total of 3.52 million ha land area under tea cultivation. Estimates show that approximately 70 % of the total world population consumes tea infusion (i.e., water extract of made tea). Contaminants may vary in the soil, air, or water in which the plants of tea are grown. There is an abundance of literature demonstrating the adverse health effects of various heavy metal and metalloid elements on the human organism. Our objective in this research is determination the trace metals which have directly effect on the human health and pollution of the environment. The samples were randomly collected from the markets and hyper markets in Eastern region, the collected samples of tea powder were stored at room temperature in dry containers for further process. The diluted digests analyzed by using Inductively Coupled Plasma (ICP-OES). The concentrations of anion groups in the selected samples were high and might affect the health of the consumers of the tea as the result showed; SO4 was ranged between 16 to 35 mg/L, NO3 was ranged between 0.1 to 5.8 mg/L, NO2 was ranged between 0 to 0.012 mg/L, PO4 was ranged between 0.29 to 1.28 mg/L and NH3 was ranged between 0.36 to 0.49 mg/L. The concentrations of nontoxic heavy metals in tea samples also were high e.g., Ca concentration (mg/kg) the maximum concentration was 173.31 and minimum concentration was 48.55, Fe concentration (mg/kg) the maximum concentration was 49.861 in some of the samples. K concentration (mg/kg) the maximum concentration was 158.96 to 101.69, Mg concentration (mg/kg) the maximum concentration was 150.24 and minimum concentration was 24.913. About toxic heavy metals in tea samples such as Al concentration (mg/kg) the maximum concentration was 47.276 and minimum concentration was 18.925, Cd concentration (gm/kg) the maximum concentration was 0.0339 and minimum concentration was 0, Cr concentration (mg/kg) the maximum concentration was 1.9132 and minimum concentration was 0, Pb concentration (mg/kg) the maximum concentration was 72.317 and minimum concentration was 0.1185.
Authors and Affiliations
Eltigani O. M. Omer, Osama AL
Keywords
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