Essential and toxic metals in tea (Camellia sinensis) imported and produced in Ethiopia

References

• AL-Oud SS. 2003. Heavy metal contents in tea and herb leaves. Pak J Biol Sci. 6:208–212.
   Google Scholar
• Baye H, Hymete A. 2010. Lead and cadmium accumulation in medicinal plants collected from environmentally different sites. Bull Environ Contam Toxicol. 84:197–201.
   PubMed Web of Science ®Google Scholar
• Bosque MA, Schulmacher M, Domingigo JL. 1990. Concentration of lead and cadmium in edible vegetables from Tragona province, Spain. Sci Total Environ. 95:61–70.
   PubMed Web of Science ®Google Scholar
• Candy JM, Klinowski J, Perry RH, Perry EK, Fairburn A, Oakley AE, Carpenter TA, Atack JR, Blessed G, Edwardson JA. 1986. Aluminosilicates and senile plaque formation in Alzheimer’s disease. The Lancet. 1:354–357.
   PubMed Web of Science ®Google Scholar
• Carr HP, Lombi E, Kupper H, Mcgrath SP, Wong MH. 2003. Accumulation and distribution of aluminium and other elements in tea (Camellia sinensis) leaves. Agronomie. 23:705–710.
   Google Scholar
• CTA. 2010. Executive brief update Tea: trade issues for ACP[Internet]. [cited 2012 Sept]. Available from: http://www.cta.int
   Google Scholar
• Ebadi AG, Zare S, Mahdavi M, Babaee M. 2005. Study and measurement of Pb, Cd, Cr and Zn in green leaf of tea cultivated in Gillan Province of Iran. Pak J Nutr. 4:270–272.
   Google Scholar
• Ethiopian Business Development Service Network (EBDSN). 2006. [Internet]. [cited 2006 Jun 26]. Available from: http://www.bds-ethiopia.net/investment2.html
   Google Scholar
• Fitsanakis VA, Au C, Erikson KM, Aschner M. 2006. The effects of manganese on glutamate, dopamine and γ-aminobutyric acid regulation. Neurochem Int. 48:426–433.
   PubMed Web of Science ®Google Scholar
• Fung KF, Zhang ZQ, Wong JWC, Wong MH. 1999. Fluoride contents in tea and soil from tea plantations and the release of fluoride in to tea liquor during infusion. Environ Pollut. 104:197–205.
   Web of Science ®Google Scholar
• Han W-Y, Shi YZ, Ma LF, Ruan JY. 2005. Arsenic, cadmium, chromium, cobalt and copper in different types of Chinese tea. Bull Environ Contam Toxicol. 75:272–277.
   PubMed Web of Science ®Google Scholar
• Hope S-J, Daniel K, Gleason KL, Comber S, Nelson M, Powell JJ. 2006. Influence of tea drinking on manganese intake, manganese status and leukocyte expression of MnSOD and cytosolic amino peptidase. Eur J Clin Nutr. 60:1–8.
   PubMed Web of Science ®Google Scholar
• Itanna F. 2002. Metals in leafy vegetables grown in Addis Ababa and toxicological implications. Ethiop J Health Dev. 16:295–302.
   Google Scholar
• Joint FAO/WHO Expert Committee on Food Additives. 1999. Summary and conclusions. 53rd meeting, 1999 Jun 1–10; Rome.
   Google Scholar
• Kies C. 1994. Bioavailability of manganese. In: Klimis-Tavantzis DL, editor. Manganese in health and disease. Boca Raton (FL): CRC Press; p. 39–58.
   Google Scholar
• Kumar A, Nair AGC, Reddy AVR, Garg AN. 2005. Availability of essential elements in Indian and US tea brands. Food Chem. 89:441–448.
   Web of Science ®Google Scholar
• Lu HT, Mou SF. 2000. Simultaneous determination of copper,nickel, zinc, cadmium, cobalt, manganese and lead in tea by ion chromatography. Lihua Jianyan Huaxue Fence. 36:51–54.
   Google Scholar
• McLaren DS, Burman D, Belton NR. 1991. Textbook of pediatric nutrition. 3rd ed. London: Churchill Livingstone; p.451–483.
   Google Scholar
• Minsitry of Agriculture and Rural Development: Agriculture Investment Potential of Ethiopia. 2009 Mar 8–10; Addis Ababa.
   Google Scholar
• Moreda-Pineiro A, Fisher A, Hill SJ. 2003. The classification of tea according to region of origin using pattern recognition techniques and trace metal data. J Food Comp Anal. 16:195–211.
   Web of Science ®Google Scholar
• Rahlenbeck SI, Burberg A, Zimmerman D. 1999. Lead and cadmium in Ethiopian vegetables. Bull Environ Contam Toxicol. 62:30–33.
   PubMed Web of Science ®Google Scholar
• Standing Committee of Analysis. 1987. Method for the determination of metals in soils, sediments and sewage sludge and plants by hydrochloric-nitric acid digestion, with a note on the determination of the insoluble metal contents. Method for the examination of waters and other materials. London: Her Majesty’s Office.
   Google Scholar
• Woldegebriel DG, Chandravanishi BS. 2010. Levels of metals in commercially available Ethiopian black teas and their infusions. Bull Chem Soc Ethiop. 24:339–349.
   Web of Science ®Google Scholar
• Woldegebriel Y, Chandravanshi BS, Wondimu T. 2012. Concentration levels of metals in vegetables grown in soils irrigated with river water in Addis Ababa, Ethiopia. Ecotoxicol Environ Saf. 77:57–63.
   PubMed Web of Science ®Google Scholar
• Wong MH, Zhang ZG, Wong JWC, Lan CY. 1998. Trace metal contents (Al, Cu, and Zn) of tea; tea and soil from two tea plantations, and tea products from different provinces of china. Environ Geochem Health. 20:87–94.
   Web of Science ®Google Scholar
• Yemane M, Chandravanshi BS, Wondimu T. 2008. Levels of essential and non essential metals in leaves of tea plant (Camellia sinensis L.) and soil of Wushwush farms, Ethiopia. Food Chem. 107:1236–1243.
   Web of Science ®Google Scholar
• Zatta P, Lucchini R, van Rensburg SJ, Taylor A. 2003. The role of metals in neuro degenerative processes: aluminum, manganese, and zinc. Brain Res Bull. 62:15–28.
   PubMed Web of Science ®Google Scholar