Research Articles >
College of Science >
Please use this identifier to cite or link to this item:
|Title: ||Determination Of Indicator Polychlorinated Biphenyls (Pcbs) By Gas Chromatography–Electron Capture Detector|
|Authors: ||Afful, Samuel|
Awudza, Johannes A.M.
Twumasi, Stevester K.
|Keywords: ||Polychlorinated biphenyls|
Electron capture detector
Minimum detectable quantities
|Issue Date: ||2013|
|Publisher: ||Chemosphere 93|
|Citation: ||Chemosphere 93 (2013) 1556–1560|
|Abstract: ||An effective method for determination of indicator polychlorinated biphenyls (PCBs) has been validated
using gas chromatography (GC) equipped with electron capture detector (ECD). The GC–ECD method was
validated by determining the linear range (working range) for determination of the compounds, minimum
detectable quantities (MDQ), the precision and accuracy of the method for the analysis of the compounds.
MDQ obtained for the compounds ranges from 0.0005 to 0.002 ng. Indeed the method was found
to be more sensitive as the number of chlorine atoms attached to the biphenyl increases. The precision
and accuracy of the GC method validated ranges from 2.4% to 14.5% and 7.0% to 14.6% respectively.
Coefficient of variation associated with the repeatability of the retention times and corresponding peak
areas was found to be 0.0001–0.0007 for the retention times and 0.0014–0.059 for the peak areas. Percentage
recoveries for the compounds were in the range of 95.7–101.0%. The validated method was then
applied to determine levels of indicator PCBs in sediments sampled from eleven sampling points along
the Lake Bosuntwi in Ghana and the highest PCB load of 19.17 ng g 1 was recorded at Pipie No. 2. PCB
52 and PCB 101 were found to be the most ubiquitous indicator PCBs in the study area, both with
|Description: ||Article published in Chemosphere 93 (2013) 1556–1560. Also available at www.elsevier.com/locate/chemosphere|
|Appears in Collections:||College of Science|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.