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The occurrence of sterols and n-alkanes in surface sediments from rivers and canals in the Niger Delta, Nigeria, determined with a gas chromatography–mass spectrometry method, was used to assess the impacts of anthropogenic activities in the area. The concentrations of total sterols (∑ 8 Sterol) and n-alkanes (∑ 28 n-alkane) in the sediments ranged from 133 to 2040ng/g and 474 to 79,200ng/g,...
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