Determination Of Common Ions And Heavy Metals In Bottled Waters Consumed In Ethiopia

Concentration of six trace elements, nine major ions and two physical parameters in sixrndifferent brands of bottled water obtained from Ethiopia were investigated. For comparisonrnpurpose, sample of tap water from Addis Ababa was also analysed. Cd, Cu, Cr, Fe, Pb, Zn, Na,rnK, Mg and Ca contents of the drinking water samples were determined by FAAS.rnConcentrations of F-, Cl-, NO3-, SO42-and PO43- were determined by IC. The data showed thernvariation of the investigated parameters in water samples as follows: Fe 0.035-0.086 mg/L, Znrn0.088-0.334 mg/L, Na 2.77-48.03 mg/L, K 1.19-4.40 mg/L, Mg 1.30-3.42 mg/L, Ca 1.63-rn11.59 mg/L, F- < 0.20-0.92 mg/L, Cl- 4.84-12.38 mg/L , NO3- < 0.42-8.38 mg/L, SO42- < 0.36-rn10.26 mg/L pH 7.35-8.34 and EC 119.7-579.3 μS/cm. Cd, Cu, Cr, Pb and PO43- concentrationsrnin all the drinking water samples were below the detection limit. Concentration levels of all thernanalysed trace metals and common ions investigated in all examined water samples were belowrnthe maximum contaminant level prescribed by WHO regulations. Some of the physicalrnparameters, pH and electrical conductivity were determined. pH in all the samples was with inrnthe permissible limit of WHO drinking water quality guidelines.rnKey Words: FAAS, IC, Bottled Water, Metal, Common Anions, Physical Parameters

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