Quantitative Chemical Analysis By Electrolysis

May 20, 2012 · Filed Under Electrolysis 

PREFACE TO FIRST EDITION. THE attention of the translator was drawn to the original work, of which the following is a translation, by finding it to be the only source of knowledge of the subject outside of scattered articles in the journals, and thus convenient and almost indispensable, as a laboratory handbook, to himself and a d v a k d students. It is in the hope of rendering it more available to all who may have occasion to use electrolytic inethods in quailtitative analysis, and of increasing and stimulating tlie use of these valuable methods, that he has undertaken the translation. Twelve or fifteen years ago, when the translator was a student, electrolytic methods in analysis were practically unknown in one of the first laboratories of the country they still occupy a very subordinate position in inany of tlie leading laboratories. The translator believes that they can, with advantage, be much more widely used in this country, in both scientific and technical laboratories, especially where a current from a dynamo, or power to run a small dynamo, is available. He trusts that he may be found to have contributed to such a result by rendering available, in English, this coinplete and standard work. As the original is the work of a specialist, ancl recently published, tlie translator has had little occasion to add to his labors those of, an . editor. A few . additions have been made, touching matters of inore recent date that have fallen under his eye. All such additions are ellclosed in brackets. – The thanks of the translator are due to Prof. 0. D. Allen, of the Sheffield Scientific School of Yale College, for revision of portions of the translation relating to the analysis of metallurgical products and to his colleagues, Profs. I. Thornton Osmond and Williarn Frear, – to the former for revision of the portioi of the proof relating to the use of the dynamo, and to the latter for frequent suggestioils througllout the progress of the work. THE PENNSYLVANIA STATE COLLEGE, CHEMICAL LABORATORY, June, 1887. PREFACE TO SECOND EDITION. SINCE the appearance of the first edition of this book, I have devoted myself exclusively to experimental work having for its object the further developnlent of quantitative analysis by electrolysis as an independent branch of the subject. This new method of analysis may now be considered as established in its essential points. The great advantage of quantitative electrolysis, apart froin its greater simplicity, lies unquestionably in the fact that the electric current does the work of the analyst, setting him free to carry on other work. Long experience has shown, that, if the methocls are correctly followed, even unskilled analysts obtain results that experienced chemists can with difficulty reach by the ordinary methods of gravimetric analysis. Since a large nnnlber of the most different analyses call now be carried on at the same time a result hitherto impossible to attain, I may be permitted to hope that analysis by electrolytic methods may come more and more into use in scientific and technical laboratories. A. CLASBEN. AACHEN, September, lSS5. v TRANSLATORS PREFACE TO SECOND EDITION, LITTLE ne eds to be said in introducing this new edition. The author, in his preface, calls attention to the many additions that have been inade…

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