Determination of cardamonin using a chemiluminescent flow-injection method.
A sensitive and selective flow injection chemiluminescence method for the determination of cardamonin over the range 1.0 x 10(-8) to 8.0 x 10(-6) g/mL is described. The method is based on the enhancement by cardamonin of the chemiluminescence of the reaction between cerium (IV) and rhodamine 6G in sulphuric acid medium. The optimised flow injection procedure yielded a detection limit for cardamonin of 8.8 x 10(-9) g/mL, whilst the relative standard deviations of intraday and inter-day precision were below 2.5%. The method has the advantages of high sensitivity and a wide linear range. It was successfully applied to the determination of cardamonin in Alpinia katsumadai Hayata. The mechanism of the chemiluminescence reaction is proposed.
Zhang
Qunlin
Q
Department of Chemistry, University of Science and Technology of China, Hefei, Anhui.
Myint
Aung
A
Cui
Hua
H
Ge
Xuewu
X
Liu
Lijuan
L
Chou
Guixin
G
D002563:Cerium / Q000737:chemistry; D047188:Chalcones; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D005419:Flavonoids / Q000032:analysis* / Q000737:chemistry; D017022:Flow Injection Analysis / Q000379:methods*; D008163:Luminescent Measurements / Q000379:methods*; D015394:Molecular Structure; D012235:Rhodamines / Q000737:chemistry; D012680:Sensitivity and Specificity
D047188:Chalcones; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D012235:Rhodamines; D002563:Cerium; C436747:cardamonin