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 Horrall, B. E. Articles by Epple, W. F. Search for Related Content PubMed Articles by Horrall, B. E. Articles by Epple, W. F.

A Modification of the Ritter Test for Copper in Butter¹

Department of Dairy Husbandry, Purdue Agricultural Experiment Station, Lafayette, Indiana

ABSTRACT

1. A modified Ritter Test for copper in butter has been described.
   
2. Three classes of readings for this copper test have been proposed to designate the extent of the copper contamination in the butter.
   
3. The test is influenced by a high pH of the butter serum, but may be corrected by the use of a small quantity of N/10 H₂SO₄.
   
4. The copper contamination of Indiana butter was found to be 39.1 per cent negative, 39.6 per cent slight and 21.3 per cent positive according to the modified test.
   
5. The comparison of butter of high copper contamination from one creamery and that of another creamery with very little contamination was made.
   
6. This modified test although qualitative is fairly accurate in determining the extent of copper contamination in butter and is also a rapid, inexpensive test.
   

¹ Published with the approval of the Director of the Purdue Agricultural Experiment Station.