International Journal of Technology Enhancements and Emerging Engineering Research (ISSN 2347-4289)

IJTEEE >> Volume 2 - Issue 8, August 2014 Edition

International Journal of Technology Enhancements and Emerging Engineering Research  
International Journal of Technology Enhancements and Emerging Engineering Research

Website: http://www.ijteee.org

ISSN 2347-4289

Determination Of Pb (II), Cr (VI) And Cd (II) Contents In Some Ethiopia Spices After Microwave Digestion Using Atomic Absorption Spectroscopy

[Full Text]



Kassa Belay



Key words: microwave oven, fenugreek, black cumin, ginger, garlic



ABSTRACT: The concentrations of Lead, Cadmium and Chromium in spice samples collected from eastern Ethiopia were determined after digesting the samples by microwave oven using an oxi acid mixture of 4:2 mL HNO3/H2O2 for 2 min in 250 watt. Contents of investigated trace metal in spice samples of Lead in Fenugreek, Black cumin, garlic and ginger 0.0140, 0.0224, 0.0058, 0.0172 mg/kg respectively. Cadmium is detected only in Fenugreek in the ranged of ND to 0.0175mg/kg where as Chromium in Fenugreek, Black cumin, Garlic and Ginger 0.0219, 0.0152, 0.0016, 0.0258 mg/kg respectively.



[1] AOAC (Association of Official Analytical Chemists), 1995,Official Methods of Analysis, 16th ed., Arlington, Virginia, USA..

[2] Kingston H.M., L.B Jassie , 1986, microwave energy for acid decomposition at elevated temperatures and pressures using biological and botanical samples. Journal of Analytical Chemistry , 58 ( 12) , 2534-2541.

[3] Mustafa S., T.Mustafa, N.Ibrahim and S.Hayati, 2004, Comparison of digestion procedures for the determination of trace metal contents in spice samples produced in Turkey. Journal of Food and Drug Analysis, Vol. 12( 3), P.254-258.

[4] Polkowska-M. H., B.Danko, R.Dybczynski, A. K.-Ammerlaan and P. Bode, 2000, Effect of acid digestion method on cobalt determination in plant materials. Analytical Chemical Acta 408: 89-95.

[5] Volesky, B and H. May-Phillips, 1995, Biosorption of heavy metals by Saccharomyces cerevisiae. Journal of Applied Microbiology Biotechnology. 42: 797-806.

[6] Wahid and S.K Durrani, 1989. Concentration of selected heavy metals in spices, dry fruits and plant nuts. Plant Foods for Human Nutrition. 39(3): 279-286.

[7] Wang, JL, 2006, Biosorption of copper (II) by chemically modified biomass of Saccharomyces cerevisiae. Process Biochemistry. 37: 84750.

[8] White, T.R and G.E.Douthit , 1985, Use of microwave oven and nitric acid-hydrogen peroxide digestion to prepare botanical materials for elemental analysis by inductively coupled argon plasma emission spectroscopy. Journal Association of Analytic Chemistry, 68: 766-69.