H. Liu et al., TURBIDIMETRIC MEASUREMENT OF HAZE IN CANOLA OIL BY ACETONE PRECIPITATION, Journal of the American Oil Chemists' Society, 73(11), 1996, pp. 1557-1560
Formation of turbidity in canola oil was facilitated with addition of
acetone, and a method to measure the sediment content based on the oil
turbidity has been developed. Canola oil was mixed with acetone at th
e ratio of 60:40, and the turbid solution developed in an ice bath for
20 min. The turbidity of the oil solution was determined by a turbidi
meter. The relation between turbidity of the oil solution and sediment
content was nonlinear and could be correlated by a second-order polyn
omial. There was no difficulty in the development of turbidity in cano
la oil solutions in the presence of added lecithin (2%, w/w). However,
with added lecithin, turbidity was 23% higher at the same sediment co
ntent.