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|Title: ||Method Verification of Total Digestion Technique for the Determination of Nine Heavy Metals in Soil Using Flame, Graphite Furnace and Cold Vapor, coupled with atomic absorption spectrometer|
|Authors: ||Frimpong, S. K|
Koranteng, S. S.
Voegborlo, R. B.
Dampare, S. B.
Yeboah, P. O.
|Issue Date: ||Jun-2018|
|Publisher: ||Open Access Journal of Chemistry|
|Abstract: ||In this study a method of quantitative analysis for the determination of total heavy metals in soils by atomic
absorption spectroscopy (flame, graphite furnace and cold-vapour options) using USEPA method 3052
sample digestion technique was evaluated and applied. Method parameters such as linearity, accuracy,
repeatability, limit of detection, limit of quantification and robustness were assessed using laboratory
fortified soil for all heavy metals studied. The results showed satisfactory average recoveries for all metals
(65% - 107%) and good linearity in terms of regression co-efficient greater than or equal to 0.997.
Repeatability was also verified with relative standard deviation values all less than 10%. Thus, the method
was deemed satisfactory and effective, and was used for the intended purpose of heavy metal determinations
in surface soils of twenty (20) public parks in Greater Accra Region, Ghana. The results from the
monitoring study demonstrated the contributions of anthropogenic activities as sources to heavy metal
contamination in the study area as a result of industrialization and urbanization. With mercury ranging
from 0.001 – 0.094 mg/kg, cadmium (0.12 – 0.50 mg/kg) and even higher concentrations of lead observed
(11.28 – 628.31 mg/kg) confirming the use of leaded fuel in the study area. The abundance order of the
heavy metals in surface soils for this study was Fe >> Mn > Zn > Cr > Pb > Cu > Ni > Cd > Hg.|
|Description: ||An article published by Open Access Journal of Chemistry|
|Appears in Collections:||College of Science|
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