Read e-book online A Practical Handbook of Seawater Analysis PDF

By J. D. H. Strickland

310 pages. Hardcover with dirt jacket. Fisheries examine Board of Canada.

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CALCULATION OF BICARBONATE IoN CONCENTRATION [HC03)1- Required: Carbonate alkalinity, chlorinity or salinity, initial temperature, pH, and the temperature at which the pH was measured, the dissociation constant K, where K is defined as 2 aH X [C03] - [HC03)1- 33 34 A PRACTICAL HANDBOOK OF SEAWATER ANALYSIS where aH is measured by a glass electrode. Values for K as a function of temperature (in situ) and chlorinity (or salinity ) are collected in Table XII. a. Calculate the initial pH of the water from Table III.

Assoc. , 1 9 : 747, 1 934 ) . For pH measurements to have much value in such a buffered medium as sea water they must be carried out with great care using internationally accepted standard buffers as reference points on a glass-electrode pH scale. I. II. In the first, we describe the experimental details for the determination of pH and total alkalinity. In the second, we describe the calculations necessary for the full evaluation of the carbon dioxide system. 1. DETERMINATION OF EXPERIMENTAL QUANTITIES 1 .

H. CALIBRATION This is given by the factors in Table XIII. The values for total C02 obtained by this method do not agree too well with results obtained by the pH-alkalinity method, being several per cent less. The discrepancy increases at higher pH values. It seems reasonable to assume that errors exist in both procedures but there is evi­ dence that the pH method gives a progressively greater error (high) as the pH increases. The Van Slyke technique is capable of much greater precision than the pH-alkalinity method and is well suited for measuring small changes in of various seawater samples.

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A Practical Handbook of Seawater Analysis by J. D. H. Strickland

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