The occurrence and nature of electrochemical activity in milk from a herd of dairy cows.
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.
Brain
Jarod
J
AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand.
Collier
Wendy
W
Hart
Alan
A
D000818:Animals; D001205:Ascorbic Acid / Q000737:chemistry; D002417:Cattle; D004563:Electrochemistry / Q000379:methods; D005260:Female; D008892:Milk / Q000737:chemistry*; D010088:Oxidoreductases / Q000378:metabolism; D006109:Poaceae; D014503:Urate Oxidase / Q000378:metabolism; D014527:Uric Acid / Q000737:chemistry*
D014527:Uric Acid; D010088:Oxidoreductases; D014503:Urate Oxidase; D001205:Ascorbic Acid