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Prevalence of endocrine disrupting phthalate esters in selected foods and food wrappers from some some supermarkets around Pretoria, South Africa

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dc.contributor.advisor Awofolu, O.R. (Prof.)
dc.contributor.author Baloyi, Ntsako Dellas
dc.date.accessioned 2012-07-31T06:49:54Z
dc.date.available 2012-07-31T06:49:54Z
dc.date.issued 2012-06
dc.identifier.uri http://hdl.handle.net/10500/6065
dc.description.abstract Food is one of the main routes by which xenobiotic (synthetic) chemicals enter the body of man and wildlife. The routes could be from wrappers in which the foods are presented with possible transfer of the compounds to consumers, hence need for regular screening. The research work is aimed at investigating possible prevalence of phthalate esters in selected foods (cheese, polony and vienna) and their plastic wrappers from commercial stores in Tshwane metropolis. Food samples were purchased from selected stores, taken to the laboratory and stored at 4oC until analysed. Analysis was done by soxhlet extraction while determination and quantification of phthalates was carried out using Gas Chromatography-Flame Ionization Detection (GC-FID). Quality assurance of the process was by standard addition of the phthalate ester standards. Results obtained revealed good chromatographic separation of the analysed esters which ranged from 5.55 min for Dimethyl phthalate (DMP) to 8.96 min for Benzylbutyl phthalate (BBP). Instrumental detection limit of the esters varied from 0.03 - 0.05 μg/kg. The percentage recovery of the phthalate esters ranged from 75 – 90% from spiked cheese samples; 33 – 66% from spiked polony samples and 69 – 99% from spiked vienna samples. These recoveries are quite acceptable and applicable to the analysis and quantification of the compounds in the samples with the exception of Dibutyl phthalate (DBP) (33%); DMP (34%) and BBP (46 %) in polony samples. Results from chromatographic quantification revealed the absence of or non-detection of most of the analysed phthalate esters in the selected food samples. However, level of 0.031 μg/kg of BBP - 0.816 μg/kg of DMP were obtained in some of the analysed samples. en
dc.format.extent 1 online resource (xi, 74 leaves) : ill.
dc.language.iso en en
dc.subject Endocrine disrupting en
dc.subject Food wrappers en
dc.subject Phthlate esters
dc.subject.ddc 664.070968227
dc.subject.lcsh Food -- Microbiology -- South Africa -- Pretoria
dc.subject.lcsh Food -- South Africa -- Pretoria -- Analysis
dc.subject.lcsh Phthalate esters -- Health aspects -- South Africa -- Pretoria
dc.subject.lcsh Food contamination -- South Africa -- Pretoria -- Testing
dc.subject.lcsh Food containers -- Health aspects -- South Africa -- Pretoria
dc.subject.lcsh Endocrine disrupting chemicals -- Analysis
dc.title Prevalence of endocrine disrupting phthalate esters in selected foods and food wrappers from some some supermarkets around Pretoria, South Africa en
dc.type Dissertation en
dc.description.department Environmental Sciences
dc.description.degree M.Sc. (Environmental Science)


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