Analysis of Seawater : A Guide for the Analytical and by T.R. Crompton

By T.R. Crompton

This practice-oriented guidebook collects approximately all tools released due to the fact that 1975 at the chemical research of seawaters. special descriptions of either classical and so much complex physico-chemical and chemical thoughts together with forty five tables and forty eight figures make this quantity a useful resource for analysts, oceanographers, fisheries specialists, politicians and selection makers engaged in seawater environmental safeguard. The equipment are awarded in a logical demeanour in order that the reader can with ease learn how to practice them.

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Extra info for Analysis of Seawater : A Guide for the Analytical and Environmental Chemist

Sample text

Even the air entering the sampling area should be cleaned of hydrocarbons, perhaps by filtration through charcoal. The all-pervasive smell of diesel fuel in most oceanographic vessels does not bode well for the accuracy of any analyses for petroleum hydrocarbons. If the analyses are to be performed on board, the room in which the samples are prepared and analysed should, in fact, be built as a clean room. Many modern oceanographic vessels are constructed to accept modular laboratories, which can be removed between voyages.

Numbers refer to storage time in days. • measured in order of sampling: ◦ measured in reverse order of sampling. From [93] copper (21% and 24%, respectively), can be observed, possibly because of the formation and slow adsorption on container surfaces of hydroxo- and carbonato-complexes [90, 122]. Hence at 4 ◦ C in polyethylene containers no significant changes of heavy metal concentrations occur over a three-month period [105, 110, 123]. Scarponi et al. [93] concluded that filtration of seawater through uncleaned membrane filters shows positive contamination by cadmium, lead, and copper.

4 Sample Contamination During Analysis The environment in which samples are collected and processed during an oceanographic cruise would be considered unacceptable by any non-oceanographic microanalysis laboratory. On even the best-planned oceanographic vessels the space in which the samples are taken, the winch room and the wet lab, are normally awash in seawater, with a thin film of oil over most of the exposed surfaces. The worst case is to be found where the wet lab and winch room are combined, or where the wet lab is the natural passageway between important parts of the ship, such as the engine room and the galley.

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