Fig. 4. The effect of propofol emulsion components on thiobarbituric acid reacting substances (TBARS) in 10% soybean oil emulsion. Samples were incubated for 90 min at 37°C. Emulsions contained, where indicated, 0.25 mg/ml metabisulfite (MBS), 10.0 mg/ml propofol, and 0.05 mg/ml EDTA. Values are the means (± SD) of triplicate determinations. *Values significantly different from soybean oil emulsion with no added components.