The dry matter and fat contents of milk, cream and skim milk powder were determined as defined by Demirci and Gunduz (1994). Acidity (°SH) values of milk and cream were determined according to Demirci and Gunduz (1994). The pH of HFCS, GS and honey were determined with a pH meter (WTW pH-340, Weilheim, Germany; Anon. 1995). The glucose and fructose contents of HFCS, GS and honey were determined at HPLC (Shimadzu SCL 10 AVP, Japan) according to the method suggested by Hisil (1984).