Nylon nets are in equilibrium with hydrocarbon materials in the water column.
Plankton can extract adsorbed hydrocarbons from the net.
In a plankton tow the entire water column (water, detritus, plankton, etc.) is really being sampled for hydrocarbons and PCB.
Care must be exercised in interpreting PCB or hydrocarbon analyses of plankton. Several short tows would be more valuable than one long tow, because the latter might partially equilibrate with an area of high contaminant level encountered near the end of the tow.
Washing the nets with a good clean solvent prior to towing appears to be beneficial in reducing contamination from nets
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GRICE, G. D., G. R. HARVEY, V. T. BOWEN and R. H. BACKUS,Bull. Envir. Cont. & Toxicology, 7, 125 (1972).
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Harvey, G.R., Teal, J.M. PCB and hydrocarbon contamination of plankton by nets. Bull. Environ. Contam. Toxicol. 9, 287–290 (1973). https://doi.org/10.1007/BF01684785
- Waste Water
- Water Column
- Water Management
- Water Pollution