Journal
JOURNAL OF ANALYTICAL CHEMISTRY
Volume 67, Issue 6, Pages 591-594Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1061934812040132
Keywords
curcumin; cyclic voltammetry; extraction; analysis of spices
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Curcumin is oxidized on a glassy carbon electrode in 0.1 M LiClO4 in ethanol at the potential 0.74 V. The calibration graph is linear in the range 9.9 x 10(-6)-1.07 x 10(-4) M curcumin; the detection limit is 4.1 x 10(-6) M. Curcumin is determined in model solutions. The relative standard deviation does not exceed 0.05. A procedure is proposed for the voltammetric determination of curcumin in spices. It was shown that single extraction by ethanol quantitatively recovers curcumin from spices.
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