Permanganate-based chemiluminescence analysis of ferulic acid using flow injection.
A simple, sensitive and rapid flow-injection chemiluminescence method has been developed for the determination of ferulic acid based on the chemiluminescence reaction of ferulic acid with potassium permanganate in a nitric acid medium. A strong chemiluminescence signal was observed when ferulic acid was injected into an acidic potassium permanganate solution in a flow-cell. The present method allowed the determination of ferulic acid in the concentration range of 6.0 x 10(-6) to 2.0 x 10(-4) mol l(-1); the detection limit (3sigma) for ferulic acid was 9.6 x 10(-8) mol l(-1). The relative standard deviation was 1.0% for 11 replicate analyses of 2.0 x 10(-4) mol l(-1) ferulic acid. The proposed method was applied to the determination of ferulic acid in real samples with satisfactory results. Moreover, the reaction mechanism of the chemiluminescence system was primarily considered.
Li
Li Na
LN
School of Chemistry and Chemical Engineering, Southwest China Normal University, Chongqing, 400715, China.
Li
Nian Bing
NB
Luo
Hong Qun
HQ
D003373:Coumaric Acids / Q000737:chemistry*; D017022:Flow Injection Analysis / Q000379:methods*; D008163:Luminescent Measurements / Q000379:methods*; D015394:Molecular Structure; D011196:Potassium Permanganate / Q000737:chemistry*
D003373:Coumaric Acids; D011196:Potassium Permanganate; C004999:ferulic acid