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conferenceseries
.com
Volume 8
Medicinal Chemistry
ISSN: 2161-0444
Medicinal Chemistry 2018
June 14-15, 2018
June 14-15, 2018 | Barcelona, Spain
10
th
World Congress on
Medicinal Chemistry and Drug Design
Levels of selected metals in commercially available rice in Ethiopia
Bisratewongel Tegegne, Bhagwan Singh Chandravanshi
and
Feleke Zewge
Addis Ababa University, Ethiopia
T
his study reports the levels of metals in commercially available imported (Oryza sativa) and Ethiopian rice(Oryza
glaberrima). The levels of thirteen metals (Ca, Mg, K, Na, Fe, Mn, Zn, Cu, Co, Ni, Cr, Cd and Pb) were determined in six
varieties of raw rice collected from Addis Ababa supermarkets, Fogera town and Amahara Regional Agricultural Research
Institute and in one selected cooked rice by flame atomic absorption spectrometry (FAAS) after digesting the powdered rice
samples with HNO
3
, HClO
4
and H
2
O
2
mixture. The validation of optimized digestion procedure was evaluated using spiking
method and an acceptable percentage recovery was obtained. The levels of metals found in the imported and Ethiopian rice,
respectively, were in the ranges (mg/kg): Ca 75.8-630, 205-427; Mg 90.6-150, 99.5-2250; K 1680-2150, 1100-3020; Na 70.6-
78.6, 26.7-80.9; Fe 48.9-117, 41.3-113; Mn 4.1-15.5, 3.7-16.6; Zn 16.4-25.7, 15.6-140; Cu 2.7-4.9, 3.3-15; Co 12.6-14.6, 8.8-10.4;
Ni 2.5-75.1, 41.5-69.7; Cr 2.2-3.12, 2.32-4.82; Cd <0.34, 0.45-2.54; Pb 2.1-5.3, 0.8-3.8. Comparison between levels of metals in
the imported and Ethiopian rice showed significant differences for most of the metals. The results indicated that Ethiopian rice
is comparatively rich in essential metals than imported. A statistical analysis of variance (ANOVA) at 95% confidence level for
metal determination indicated significant difference between the means of each variety of samples. Comparison between levels
of metals in cooked and raw rice showed that the difference in the level is not significant.
Biography
Bisratewongel Tegegne Alemu done her PhD & MSc. from Analytical Chemistry; Addis Ababa University, she done her BSc. in Applied Chemistry from Haramaya
University, she is currently working as teacher in higher education at Bahir Dar University, Bahir Dar (Ethiopia). she received certificate of oral presenter on 4th Annual
conference of Society of Ethiopian Women in Science and Technology, and workshop on Empowering Women in Leadership Skill in Science and Technology, April 2018.
she also received certificate on Environmental Risk Assessment Management fromAfrica Center of Excellence for Water Management (ACEWM) Addis Ababa University,
Ethiopia. she won Gold Cup award for being the From Haramaya University, Ethiopia, first from the graduated batch in July 2010.
bisratchem03@gmail.comBisratewongel Tegegne et al., Med chem (Los Angeles) 2018, Volume 8
DOI: 10.4172/2161-0444-C1-039