Determination of Level of Some Heavy Metals in Honey Collected From Different Regions of Ethiopia
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Date
2010-12
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Addis Ababa University
Abstract
The qualities of 12 Ethi opian multiflora l honey samples were evaluated in terms of
common phys icochem ical parameters namely: mo isture content, pH, free acidity, lactonic
ac idity and total acidity. The values for studied quality parameters were moisture content,
14.23-19.2%; pH, 3 A-4 .8; free ac idity, 30.6-97.6 meq/Kg; lactonic ac idity, 8.06-
14Ameq/Kg and total acid ity, 42.96-107Ameq/Kg. The analyzed samples showed proper
maturity, absence of undesirable fermentation «20% of moisture content), and were 111
agreement with standard values (Codex Alimentricus) and reported literatures.
The concentrations of trace heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Z n) in the 12
multifloral honey samples collected from different regions of Ethi opia were also eva luated
using flame absorption spectrometry after wet di gestion. The accuracy of the method was
assessed by spiking honey samples with known amounts of standard meta ls, and
examining recovery. Trace heavy metal contents in the honey samples were found to be in
the range of NO-O.O 17 flg/g (Cd), NO-0.15 J.lg/g (Cr), 0.02-1.15 J.lg/g (Cu), NO-7.29 flg/g
(Mn), NO (Ni), NO-2.53 J.lg/g (Pb) and 9.96- 16.03 J.lg/g (Zn). Results obtained were in
agreement with data reported e lsewhere in literatu re.
Keyword\': Honey, physicochemical parameters, Ethiopia, wet digesti on, ato mic absorption
spectrometry, trace e lements
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Keywords
physicochemical parameters, Ethiopia, wet digesti on, ato mic absorption spectrometry, trace e lements