A Practical Handbook of Seawater Analysis - download pdf or read online

By J. D. H. Strickland

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

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SPECIAL REAGENTS 1 . p-PHENYLENEDIAMINE HYDROCHLORIDE The laboratory reagent should preferably be recrystallized once from alcohol. The recrystallized material is stable for many months if stored dry in a stoppered bottle. 0 g of recrystallized salt in a mixture of 1 00 ml of concentrated hydrochloric acid (sp gr 1 . 1 8 ) and 400 ml of distilled water. This solution, in a stoppered glass bottle, may be kept for 2-3 weeks. 2. FERRIC CHLORIDE SOLUTION Dissolve 10 g of analytical quality anhydrous ferric chloride, FeCl3, in 1 00 ml of concentrated hydrochloric acid (sp gr 1 .

The outside of the alkaline iodide pipette should not gef contaminated with manganese solutions, for if this occurs, manganese is transferred to the alkaline iodide reagent bottle. Should a precipitate of higher-valency manganese basic oxides appear in the alkaline iodide reagent it must be dis­ carded. ( b ) The sample can be allowed to stand indefinitely at this stage provided thermal con­ traction does not draw air into the bottle. (c) The top of the pipette should be placed just beneath the surface.

A suitable model may be obtained from Frederick G. , Cambridge, Massa� chusetts, USA. The following instructions apply directly to this model. 3. Only clean, redistilled mercury should be used and all taps must be care­ fully greased with stopcock grease. Leaks are to be suspected if P1 values (see later) do not duplicate to within 2 mm or if they change by more than 1 mm in the first 2-3 min after compression of the gases. 4. , by experience. Further details and description are given in the papers by Van Slyke and Neill (J.

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

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