| essential and toxic metals in tea (camellia sinensis) imported and produced in ethiopia. | sixteen samples of packed tea leaves (camellia sinensis) were purchased from supermarkets in addis ababa, ethiopia for metal analysis. elements were measured by faas and graphite furnace atomic absorption spectrometer (gfaas) employing external calibration curves. the levels in mg/kg dried weight basis varied from cu: 4.7-12.9; cd: 0.02-2.83; pb: <0.01-2.29; zn: 8.6-198.3; mn: 81.7-962.2; al: 3376.4-10,369.3; k: 7667.7-10,775; li: 0.2-0.62; ba: 9.4-1407.1; mg: 1145.6-1834.1; fe: 286.4-880.9; ca: ... | 2014 | 24779976 |