By G. Svehla
ISBN-10: 0582218667
ISBN-13: 9780582218666
Vogel's booklet is the Bible of analytical chemists. Vogel has compiled all of the most typical analytical techniques and effects into an simply e-book that's either precious and protected by way of chemistry lecturers within the kingdom. the simplest reward any chemist may desire to obtain.
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Additional info for Vogel's Qualitative Inorganic Analysis
Example text
Spot reactions on paper do not always involve interaction between a drop of test solution and one of the reagent. Sometimes the paper is impregnated with the reagent and the dry impregnated reagent paper is spotted with a drop of the solution. Special care must be taken in the choice of the impregnating reagent. Organic reagents, that are only slightly soluble in water but dissolve readily in alcohol or other organic solvents, find extensive application. Water-soluble salts of the alkali metals are frequently not very stable in paper.
8. Transferring of precipitates in some cases precipitates can be transferred from semimicro test-tubes with a small spatula (two convenient types in nickel or monel metal are shown in Fig. 20). This operation is usually difficult, particularly for centrifuge tubes. Indeed, in semimicro analysis it is rarely necessary to transfer actual precipitates from one vessel to another. ~ 15-(b) Fig. 4 If, for some reason, transfer of the precipitate is essential, a wash liquid or the reagent itself is added, the mixture vigorously stirred and the resulting suspension transferred to a reagent dropper, and the contents of the latter ejected into the other vessel; if required, the liquid is removed by centrifugation.
F) All operations involving (1) the passage of hydrogen sulphide into a solution, (2) the evaporation of concentrated acids, (3) the evaporation of solutions for the removal of ammonium salts, and (4) the evolution of poisonous or disagreeable vapours or gases, must be conducted in the fume cupboard. (g) All results, whether positive, negative, or inconclusive, must be recorded neatly in a notebook at the time they are made. The writing up of experiments should not be postponed until after one has left the laboratory.
Vogel's Qualitative Inorganic Analysis by G. Svehla
by Anthony
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