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Inside-sediment Partitioning of PAH, PCB and Organochlorine Compounds and Inferences on Sampling and Normalization Methods

Inside-sediment Partitioning of PAH, PCB and Organochlorine Compounds and Inferences on Sampling and Normalization Methods

Oliver Opel, Wolf-Ulrich Palm, Dieter Steffen, Wolfgang K L Ruck

Environ Pollut. 2011 Apr;159(4):924-31.

PMID: 21237542

Abstract:

Comparability of sediment analyses for semivolatile organic substances is still low. Neither screening of the sediments nor organic-carbon based normalization is sufficient to obtain comparable results. We are showing the interdependency of grain-size effects with inside-sediment organic-matter distribution for PAH, PCB and organochlorine compounds. Surface sediment samples collected by Van-Veen grab were sieved and analyzed for 16 PAH, 6 PCB and 18 organochlorine pesticides (OCP) as well as organic-matter content. Since bulk concentrations are influenced by grain-size effects themselves, we used a novel normalization method based on the sum of concentrations in the separate grain-size fractions of the sediments. By calculating relative normalized concentrations, it was possible to clearly show underlying mechanisms throughout a heterogeneous set of samples. Furthermore, we were able to show that, for comparability, screening at < 125 μm is best suited and can be further improved by additional organic-carbon normalization.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121157	PAH, PCBs, and Pesticides on Sediment			Price

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