Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity
Analytical methods for speciation of targeted organotin compounds (TBT and TPT) in water samples using SPE cartridge and liquid-liquid extraction has been carried out. Also, sediment analysis using methanol - acid digestion and acid- sonication extraction methods were also developed. Different...
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Cape Peninsula University of Technology
2015
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Online Access: | http://hdl.handle.net/20.500.11838/763 |
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ndltd-netd.ac.za-oai-union.ndltd.org-cput-oai-localhost-20.500.11838-7632020-10-08T05:10:52Z Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity Okoro, Hussein Kehinde Fakoti, Olalekan S., Prof Snyman R.G Adekola, F.A Analytical methods for speciation of targeted organotin compounds (TBT and TPT) in water samples using SPE cartridge and liquid-liquid extraction has been carried out. Also, sediment analysis using methanol - acid digestion and acid- sonication extraction methods were also developed. Different parameters affecting extraction and peak resolution were optimised. Also, three derivatisation procedures were optimised. The accuracy of the extraction procedure was also verified on certified reference material (BCR - 462) certified for TBT (54 ± 15 µg/kg) and DBT (68 ± 12 µg/kg). Freeze - dried mussel tissue (ERM - CE 477) certified for TBT (2.20 ± 0.19 mg/kg), DBT (1.54 ± 0.12 mg/kg) and MBT (1.50 ± 0.28 mg/kg). Good recoveries were obtained with methanol - acid digestion. The results were validated by analysing the real water and sediment samples collected from Cape Town harbour and the compounds were detected in both water and sediment samples, respectively. 2015-02-24T08:23:29Z 2016-01-27T08:01:05Z 2015-02-24T08:23:29Z 2016-01-27T08:01:05Z 2013 Thesis http://hdl.handle.net/20.500.11838/763 en Cape Peninsula University of Technology |
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NDLTD |
language |
en |
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NDLTD |
description |
Analytical methods for speciation of targeted organotin compounds (TBT and TPT)
in water samples using SPE cartridge and liquid-liquid extraction has been carried out. Also,
sediment analysis using methanol - acid digestion and acid- sonication extraction methods
were also developed. Different parameters affecting extraction and peak resolution were
optimised. Also, three derivatisation procedures were optimised. The accuracy of the
extraction procedure was also verified on certified reference material (BCR - 462) certified for
TBT (54 ± 15 µg/kg) and DBT (68 ± 12 µg/kg). Freeze - dried mussel tissue (ERM - CE 477)
certified for TBT (2.20 ± 0.19 mg/kg), DBT (1.54 ± 0.12 mg/kg) and MBT (1.50 ± 0.28 mg/kg).
Good recoveries were obtained with methanol - acid digestion. The results were validated by
analysing the real water and sediment samples collected from Cape Town harbour and the
compounds were detected in both water and sediment samples, respectively. |
author2 |
Fakoti, Olalekan S., Prof |
author_facet |
Fakoti, Olalekan S., Prof Okoro, Hussein Kehinde |
author |
Okoro, Hussein Kehinde |
spellingShingle |
Okoro, Hussein Kehinde Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
author_sort |
Okoro, Hussein Kehinde |
title |
Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
title_short |
Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
title_full |
Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
title_fullStr |
Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
title_full_unstemmed |
Environmental assessment of heavy metals and organotin compounds in Cape Town harbour, monitoring geochemistry and toxicity |
title_sort |
environmental assessment of heavy metals and organotin compounds in cape town harbour, monitoring geochemistry and toxicity |
publisher |
Cape Peninsula University of Technology |
publishDate |
2015 |
url |
http://hdl.handle.net/20.500.11838/763 |
work_keys_str_mv |
AT okorohusseinkehinde environmentalassessmentofheavymetalsandorganotincompoundsincapetownharbourmonitoringgeochemistryandtoxicity |
_version_ |
1719351442769182720 |