Automated Determination of Milk Fat in Milk

Abstract

The Technicon AutoAnalyzer has been adapted to the determination of milk fat in milk. A sample is dissolved in acetic acid containing a surfactant, and milk fat is resuspended as uniform colloidal globules by addition of water. Absorbance of the suspension is measured at 600 nm. Linear response from 1.5 to 7% milk fat is obtained. No interference from protein or lactose is encountered. The correlation coefficient is .96 between either the Babcock or Gerber method and the automated turbidimetric method. © 1972, American Dairy Science Association. All rights reserved.