HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Miscall, J. Articles by Carodemos, P. P. Search for Related Content PubMed Articles by Miscall, J. Articles by Carodemos, P. P.

Copper in Dairy Products and Its Solution under Various Conditions. II

Department of Chemistry, Cornell University, Ithaca, New York

P. P. Carodemos

Clemson College, Clemson College, North Carolina

ABSTRACT

This work is a continuation of the investigation conducted by Rice and Miscall.¹

Quam, Soloman and Hellwig² have published data on the copper dissolving power of milk. They find the temperature of maximum copper solubility between 85° and 90°C. They used thirty minutes as the time of exposure of the milk to the metal. They attribute the decrease in the copper solubility curve above 90°C. to the decreasing solubility of oxygen.

Method of procedure

In this investigation the method of Rice and Miscall¹ was followed. This consisted of allowing 2000 cc. of milk to stand, in glass flasks, in contact with twisted strips of copper, under the conditions of the experiment for two hours. The solution was then poured off the copper and evaporated to dryness, the residue ignited in a muffle furnace and the ash dissolved in a small quantity of nitric acid. The copper was electrolized onto a platinum flag, washed thoroughly with distilled water, and re-electrolized from a weak sulfuric acid solution onto a weighed rotating platinum cathode.

Presented to the Faculty of Cornell University as partial fulfillment of the requirements for the degree of Doctor of Philosophy.

¹ Rice and Miscall, Jour. Dairy Sci., 1923, vi, 261.

² Quam, Soloman and Hellwig, Jour. Indust. and Eng. Chem., (1928), xx, 930.