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. exact descriptions of either classical and so much complicated physico-chemical and chemical concepts together with forty five tables and forty eight figures make this quantity a useful resource for analysts, oceanographers, fisheries specialists, politicians and choice makers engaged in seawater environmental safety. The tools are offered in a logical demeanour in order that the reader can comfortably learn how to practice them.

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Additional resources for Analysis of Seawater : A Guide for the Analytical and Environmental Chemist

Sample text

The clean laboratory for trace metals was divided into three areas: entrance laboratory (with clothes changing annex), instrument laboratory, and ultraclean sample preparation laboratory, all under positive pressure with active charcoal filtered air. Personnel using the clean rooms were required to wear hair caps, polyethylene gloves, laboratory coats, and designated shoes. These items are worn only in the clean rooms. Mercury was determined after suitable digestion by the cold vapour atomic absorption method [40].

Samples stored in conventional polyethylene containers (properly cleaned and conditioned with prefiltered seawater) at 4 ◦ C and natural pH remain uncontaminated for three months (five months for cadmium); losses of lead and copper occur after five months storage. 0 µg/l, for cadmium, lead, and copper, respectively. The first aim of this work was to study the influence of an unwashed membrane filter on the cadmium, lead, and copper concentrations of filtered seawater samples. It was also desirable to ascertain whether, after passage of a reasonable quantity of water, the filter itself could be assumed to be clean so that subsequent portions of filtrate would be uncontaminated.

Sub-boiling distillation of deep seawater might be an efficient starting point for the production of carbon-free blanks. While at least partial solutions have been found to most of the problems of contamination, these solutions have largely been adopted piecemeal by the various laboratories engaged in research on organic materials in seawater. The reasons for the adoption of half-way measures are largely historical. The study of organic materials in seawater is relatively new, and the realisation that draconian measures are needed in the analysis is now becoming accepted.

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