Direct determination of trace aluminum with quercetin by reversed-phase high performance liquid chromatography |
| |
Authors: | Lian Hongzhen Kang Yufen Bi Shuping Arkin Yasin Shao Dalin Li Danni Chen Yijun Dai Lemei Gan Ning Tian Liching |
| |
Institution: | State Key Laboratory of Coordination Chemistry, Department of Chemistry and Center of Materials Analysis, Nanjing University, 22 Hankou Road, Nanjing 210093, PR China |
| |
Abstract: | The determination of trace levels of aluminum by high performance liquid chromatography (HPLC) with spectrophotometric detection using quercetin, a bioactive substance as a pre-column reagent, is developed in this paper. The Al-quercetin chelate was separated on a reversed-phase ODS column with a mobile phase consisting of 70% water (pH 1.0 with perchloric acid) and 30% methanol, and detected at its maximum of 415 nm. The response was linear over the 1.0×10−7 to 8.0×10−5 M concentration range with a detection limit of 5.0×10−8 M and a relative standard deviation of 1.0% at the 5×10−6 M level. The analysis was free from common ions except iron, which could be successfully screened by 1,10-phenanthroline. This method has been employed to the determination of Al in environmental and biological samples. Moreover, direct speciation of labile monomeric Al, the toxic form of Al, in natural water by the present technique was explored. The coordination ratio of Al complex with quercetin was also elucidated by HPLC combined with molar ratio method. Only a 1:1 complex was formed. Because quercetin exists in body, a preliminary thinking of in vivo determination of Al is provided in this study. |
| |
Keywords: | Aluminum Speciation HPLC Quercetin Chelation |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|