Ultrasonic spectroscopy studies of casein in water

A new ultrasound spectroscopy apparatus is described and the theory underly ing its use is outlined. Application of the technique to sodium caseinate s olutions reveals a trimodal size distribution with the largest particles di sappearing slowly with time. The results indicate that ultrasound spectrosc opy is sensitive to the degree of hydration of caseinate and therefore woul d be potentially useful in measuring dissolution kinetics. (C) 1999 Elsevie r Science Ltd. All rights reserved.