Extraction and Detection Method of Lutein Ester in Bakery Food

Abstract

In order to detect the lutein esters in bakery products and select the extraction solvents without ether, this paper studied the saponification time, KOH concentration of lutein esters in bakery products, and the extraction effect of different extraction solvents. The results showed that the optimal conditions for detecting saponification of lutein esters in baked food were: 2 g sample (batter/dough), 0.2 g BHT, 10 mL absolute ethanol, 10 mL 60 g/100 mL KOH aqueous solution, shook at room temperature for 3 h. The extraction solvent cyclohexane:n-hexane:ethyl acetate=1:2:2 was the best extractant, the recovery rate was 94.31%~103.83%, and the relative standard deviation of the precision experiment was less than 5%. These indicated that the method was suitable for the extraction and detection of lutein esters in baked food.

Keywords

• lutein esters
• high performance liquid chromatography
• bakery food
• detection
• saponification