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The occurrence and nature of electrochemical activity in milk from a herd of dairy cows

Published online by Cambridge University Press:  24 January 2006

Jarod Brain ,
Wendy Collier  and
Alan Hart
Jarod Brain
Affiliation:
AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand
Wendy Collier
Affiliation:
AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand
Alan Hart
Affiliation:
AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand
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Abstract

Amperometric sensors may be used in milk analysis but electrochemical interference from compounds other than the analyte is an on-going problem. A survey was made of the level of electrochemical activity (potential interference) in milk from a herd of dairy cows grazing on summer pasture. It was a ubiquitous feature of the aqueous phase of whey and de-proteinized milk over about 3 months. The nature of the interference was studied by differential pulse voltammetry and responses to ascorbic acid oxidase and uricase. The principal source of interference appeared to be uric acid.

Keywords

Milkinterferenceuric acidascorbic acidvoltammetry
Type
Research Article
Information
Journal of Dairy Research , Volume 73 , Issue 1 , February 2006 , pp. 115 - 120
Copyright
Proprietors of Journal of Dairy Research 2006

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