title: Krawtchouk image moment method for the simultaneous determination of three drugs in human plasma based on fluorescence three-dimensional spectra.
abstract: The interference signals and overlapped peaks are common phenomena in fluorescence determination, which seriously influence the accuracy and reliability of analytical results. In this paper, Krawtchouk image moment method was introduced to the analysis of fluorescence three-dimensional (3D) spectra and applied to the quantitative analysis of three drugs including nicotinic acid, metoprolol and amlodipine in human plasma. Without any pretreatment to the obtained spectra, Krawtchouk moments were directly calculated on the grayscale images of 3D spectra, and the quantitative linear models for the three drugs were established by stepwise regression, respectively. The determination coefficients (R) were more than 0.9906. The correlation coefficients of leave-one-out cross-validation (Rcv) were more than 0.9256. The precisions (RSD, %) of inter-day and intra-day variations were less than 8.4% and 3.1%, separately. The recovery was from 101.84% to 107.88%. The limit of quantification and the limit of detection were 0.12μgmL-1and 0.43μgmL-1, respectively. All the statistical parameters supported that the obtained models performed well and the proposed method was accurate and reliable. Our study indicates that Krawtchouk image moments with the powerful abilities of multi-resolution and extracting local information can be applied to the simultaneous determination of multi-target compounds in plasma based on fluorescence 3D spectra.
authors: College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000 PR China.
authors: Jing
authors: J
authors: Chen
authors: College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000 PR China.
authors: Bao Qiong
authors: BQ
authors: Li
authors: College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000 PR China.
authors: Min Li
authors: ML
authors: Xu
authors: College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000 PR China.
authors: Xue
authors: X
authors: Wang
authors: College of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000 PR China.
authors: Yu Hong
authors: YH
authors: Jing
authors: College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000 PR China. Electronic address: zhaihl@163.com.
authors: Hong Lin
authors: HL
authors: Zhai
mesh_terms: D017311:Amlodipine / Q000097:blood*; D006801:Humans; D021621:Imaging, Three-Dimensional; D057230:Limit of Detection; D016014:Linear Models; D008790:Metoprolol / Q000097:blood*; D008962:Models, Theoretical; D009525:Niacin / Q000097:blood*; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: D017311:Amlodipine; D009525:Niacin; D008790:Metoprolol
keywords: Amlodipine; Fluorescence spectra; Human plasma; Krawtchouk moments; Metoprolol; Nicotinic acid