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Carabajal MD, Bortolato SA, Lisandrini FT, Olivieri AC. An exhaustive analysis of the use of image moments for second-order calibration. A comparison with multivariate curve resolution-alternating least-squares. Anal Chim Acta 2024; 1288:342177. [PMID: 38220307 DOI: 10.1016/j.aca.2023.342177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/16/2024]
Abstract
BACKGROUND the chemometric processing of second-order chromatographic-spectral data is usually carried out with the aid of multivariate curve resolution-alternating least-squares (MCR-ALS). Recently, an alternative procedure was described based on the estimation of image moments for each data matrix and subsequent application of multiple linear regression after suitable variable selection. RESULTS The analysis of both simulated and experimental data leads to the conclusion that the image moment method, although can cope with chromatographic lack of reproducibility across injections, it only performs well in the absence of uncalibrated interferents. MCR-ALS, on the other hand, provides good analytical results in all studied situations, whether the test samples contain uncalibrated interferents or not. SIGNIFICANCE The results are useful to assess the real usefulness of newly proposed methodologies for second-order calibration in the case of chromatographic-spectral data sets, especially when samples contain unexpected chemical constituents.
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Affiliation(s)
- Maira D Carabajal
- Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina; Instituto de Química Rosario (CONICET-UNR), 27 de Febrero 210 Bis, 2000, Rosario, Argentina
| | - Santiago A Bortolato
- Departamento de Matemática, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina; Instituto de Química Rosario (CONICET-UNR), 27 de Febrero 210 Bis, 2000, Rosario, Argentina
| | - Franco T Lisandrini
- Physikalisches Institut, University of Bonn, Nussallee 12, 53115, Bonn, Germany
| | - Alejandro C Olivieri
- Departamento de Química Analítica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000, Rosario, Argentina; Instituto de Química Rosario (CONICET-UNR), 27 de Febrero 210 Bis, 2000, Rosario, Argentina.
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Chen Y, Chen T, Duan W, Liu J, Si Y, Dong Z. Rapid measurement of brown tide algae using Zernike moments and ensemble learning based on excitation-emission matrix fluorescence. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 294:122547. [PMID: 36870184 DOI: 10.1016/j.saa.2023.122547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 01/27/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
Accurate real-time prediction of microalgae density has great practical significance for taking countermeasures before the advent of Harmful algal blooms (HABs), and the non-destructive and sensitive property of excitation-emission matrix fluorescence (EEMF) spectroscopy makes it applicable to online monitoring and control. In this study, an efficient image preprocessing algorithm based on Zernike moments (ZMs) was proposed to extract compelling features from EEM intensities images. The determination of the highest order of ZMs considered both reconstruction error and computational cost, then the optimal subset of preliminarily extracted 36 ZMs was screened via the BorutaShap algorithm. Aureococcus anophagefferens concentration prediction models were developed by combining BorutaShap and ensemble learning models (random forest (RF), gradient boosting decision tree (GBDT), and XGBoost). The experimental results show that BorutaShap_GBDT preserved the superior subset of ZMs, and the integration of BorutaShap_GBDT and XGBoost achieved the highest prediction accuracy. This research provides a new and promising strategy for rapidly measuring microalgae cell density.
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Affiliation(s)
- Ying Chen
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China.
| | - Ting Chen
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Weiliang Duan
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Junfei Liu
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Yu Si
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Zhiyang Dong
- Hebei Province Key Laboratory of Test/Measurement Technology and Instrument, School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
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New Constructed EEM Spectra Combined with N-PLS Analysis Approach as an Effective Way to Determine Multiple Target Compounds in Complex Samples. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238378. [PMID: 36500471 PMCID: PMC9740148 DOI: 10.3390/molecules27238378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/26/2022] [Accepted: 09/20/2022] [Indexed: 12/02/2022]
Abstract
Excitation-emission matrix (EEM) fluorescence spectroscopy has been applied to many fields. In this study, a simple method was proposed to obtain the new constructed three-dimensional (3D) EEM spectra based on the original EEM spectra. Then, the application of the N-PLS method to the new constructed 3D EEM spectra was proposed to quantify target compounds in two complex data sets. The quantitative models were established on external sample sets and validated using statistical parameters. For validation purposes, the obtained results were compared with those obtained by applying the N-PLS method to the original EEM spectra and applying the PLS method to the extracted maximum spectra in the concatenated mode. The comparison of the results demonstrated that, given the advantages of less useless information and a high calculating speed of the new constructed 3D EEM spectra, N-PLS on the new constructed 3D EEM spectra obtained better quantitative analysis results with a correlation coefficient of prediction above 0.9906 and recovery values in the range of 85.6-95.6%. Therefore, one can conclude that the N-PLS method combined with the new constructed 3D EEM spectra is expected to be broadened as an alternative strategy for the simultaneous determination of multiple target compounds.
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Hu Y, Xing H, Zhao D, Xu Y, Qin Y, Ren H. Novel method based on inherent connection between absorption and fluorescence spectra for water contaminant analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 275:121138. [PMID: 35305359 DOI: 10.1016/j.saa.2022.121138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/25/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Multi-source spectroscopy is increasingly applied in water contaminant analysis, and general existing spectral features are based on direct mathematical statistics rather than revealing inherent connection between multisource spectra, which has restricted the accuracy and robustness performance. Here in, a novel method is proposed and it is based on the inherent connection between fluorescence and absorption spectra, which can reflect deeper information than conventional methods. The relevant theory was analyzed based on energy level transition and the symmetry between absorption and fluorescence spectra, and then three features were extracted related to internal molecular properties and dependent on two sources of spectral information simultaneously. The three features include the width of the fluorescence emission peak, Stokes shift and symmetry axis between absorption peak and fluorescent emission peak, that correspond to bandwidth of the ground state, vibrational relaxations and conjugate systems respectively. Their significant change of values in monitoring can reflect richer and deeper information in pollution events for contamination tracing and subsequent processing, such as the category, common properties and functional groups of contaminants. The effectiveness of this feature extraction method was assessed by conducting experiments with sample mixtures of typical chemicals and four real water samples. The results highlight the potential of these features in water pollution early warning and contaminant analysis with richer information and stronger robustness.
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Affiliation(s)
- Yingtian Hu
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
| | - Hang Xing
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Dongdong Zhao
- College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yuxin Xu
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yali Qin
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Hongliang Ren
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
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Kamal AH, Hammad SF, Kamel DN. Chemometric spectrophotometric methods for simultaneous estimation of metoprolol succinate and amlodipine besylate in their tablet formulation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 254:119641. [PMID: 33711776 DOI: 10.1016/j.saa.2021.119641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Two simple chemometric spectrophotometric methods; isosbestic point and dual wavelength methods were developed, validated and applied to the determination of metoprolol succinate in presence of amlodipine besylate in their binary mixtures and in combined tablet formulation while amlodipine besylate was determined by direct spectrophotometry at λ = 365 nm within linearity range of 2-25 μg/mL. The mean percentage recovery ± SD was 99.921 ± 0.089 for amlodipine besylate. Two proposed chemometric spectrophotometric methods were developed for the spectral resolution of metoprolol succinate in presence of amlodipine besylate without preliminary separation with a linearity range of 2-30 μg/mL metoprolol succinate. The first method depended on measuring the absorbance at the isosbestic point at λ = 226 nm. The mean percentage recovery ± SD was 100.110 ± 0.249 for metoprolol succinate. The second method was dual wavelength method, metoprolol could be determined alone using the absorbance difference between 226 nm and 248.7 nm where the absorbance difference was zero for amlodipine at these two wavelengths. The mean percentage recovery ± SD was 99.734 ± 0.438 for metoprolol succinate using dual wavelength method. The developed methods were validated as per ICH guidelines and were successfully applied to analysis of cited drugs in their synthetic tablet formulation. The results obtained by the developed methods were statistically compared to those obtained by a reported one using t-test and F- test. Good agreement was observed.
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Affiliation(s)
- Amira H Kamal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt.
| | - Sherin F Hammad
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt
| | - Doaa N Kamel
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Tanta University, Tanta, Egypt
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Pan Z, Li RH, Cui YY, Wu XJ, Zhang YY, Wang YT. A simple and quick method to detect adulterated sesame oil using 3D fluorescence spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 245:118948. [PMID: 32980759 DOI: 10.1016/j.saa.2020.118948] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/01/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
Adulterated sesame oil seriously damages the interests of consumers and the health of market. In this paper, a simple, fast and real-time model for identifying adulterated sesame oil (ASO) was proposed by combining 3D fluorescence spectra with wavelet moments (WMs). First, noise and data volume of the experimental data were reduced by wavelet multiresolution decomposition (WMRSD), which improved the stability and real-time of the model. Next, WMs were used to extract the features of the 3D fluorescence spectra and proved to be effective by hierarchical clustering results. Then, the qualitative quality of WMs of the same orders, different orders and the combinations were evaluated by Dunn's validity index (DVI), and the rules were given, respectively. Finally, the target WMs for identifying ASO were determined. This model is simple and fast, and expandable to online measurement, providing a reference for identification and adulteration of vegetable oils.
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Affiliation(s)
- Zhao Pan
- Key Lab of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
| | - Rui Hang Li
- Key Lab of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
| | - Yao Yao Cui
- School of Information Science and Engineering, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
| | - Xi Jun Wu
- Key Lab of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
| | - Yu Yan Zhang
- Key Lab of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
| | - Yu Tian Wang
- Key Lab of Measurement Technology and Instrumentation of Hebei Province, Yanshan University, Hebei Street West438#, Qinhuangdao, Hebei 066004, China.
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Hu Y, Zhao D, Qin Y, Wang X. An enhancement approach of fluorescence signatures in excitation emission matrixes for water contaminant analysis. WATER RESEARCH 2020; 169:115271. [PMID: 31731246 DOI: 10.1016/j.watres.2019.115271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/30/2019] [Accepted: 11/02/2019] [Indexed: 06/10/2023]
Abstract
Three-dimensional fluorescence spectroscopy has been widely used for the analysis of water contaminants. However, the problems of weak signals and overlapping fluorescence peaks remain unresolved. In this work, we studied the impact of absorption on the spectral shape of fluorescence and found that it is a major cause of overlapping peaks and weak signals. An approach is proposed to purify fluorescent signals and enhance fluorescence signatures based on the theory of fluorescence quantum yield. Using this theory, the problems of noise amplification and singularity points were identified, and an optimization algorithm was proposed related to Wiener filtering. For practical application to multiple compounds, three overlapping cases were discussed theoretically. The effectiveness of this procedure in subsequent parallel factor analysis was assessed and compared with original data by conducting experiments with six typical compounds and real water samples. The results indicate that overlapping along the excitation wavelength axis can be reduced despite the existence of multiple compounds, and the sensitivity of weak fluorescent signals can be significantly improved. The proposed method can enhance fluorescence signatures for the separation and analysis of fluorescent components in water contaminants.
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Affiliation(s)
- Yingtian Hu
- College of Information Engineering, Zhejiang University of Technology, Hangzhou, 310023, China.
| | - Dongdong Zhao
- College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou, 310023, China
| | - Yali Qin
- College of Information Engineering, Zhejiang University of Technology, Hangzhou, 310023, China
| | - Xiaoping Wang
- Key Laboratory of Ocean Observation-Imaging Testbed, Zhejiang University, Zhoushan, 316021, China
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Muhire J, Li BQ, Zhai HL, Wang X, Xu ML. A fast chemometrics approach to quantitative analysis of metformin hydrochloride, enalapril maleate, and captopril in tablets based on HPLC-PAD spectra. ACTA CHROMATOGR 2019. [DOI: 10.1556/1326.2018.00479] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Jules Muhire
- College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, PR China
| | - Bao Qiong Li
- College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, PR China
| | - Hong Lin Zhai
- College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, PR China
| | - Xue Wang
- College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, PR China
| | - Min Li Xu
- College of Chemistry & Chemical Engineering, Lanzhou University, Lanzhou, 730000, PR China
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Green micellar HPLC-fluorescence method for simultaneous determination of metoprolol and amlodipine in their combined dosage form: Application on metoprolol in spiked human plasma. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.084] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Yin B, Li SS, Lu SH, Mi JY, Zhai HL. Simultaneous quantification of multiple endogenous biothiols in cancer cells based on a multi-signal fluorescent probe. Analyst 2019; 144:4575-4581. [DOI: 10.1039/c9an00691e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The feature information was extracted from the 3D spectrum by the TM method, and the simultaneous quantification of intracellular thiols was realized.
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Affiliation(s)
- Bo Yin
- College of Chemistry & Chemical Engineering
- Lanzhou University
- Lanzhou
- PR China
| | - Sha Sha Li
- College of Chemistry & Chemical Engineering
- Lanzhou University
- Lanzhou
- PR China
| | - Shao Hua Lu
- College of Chemistry & Chemical Engineering
- Lanzhou University
- Lanzhou
- PR China
| | - Jia Ying Mi
- College of Chemistry & Chemical Engineering
- Lanzhou University
- Lanzhou
- PR China
| | - Hong Lin Zhai
- College of Chemistry & Chemical Engineering
- Lanzhou University
- Lanzhou
- PR China
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Li SS, Li BQ, Liu JJ, Lu SH, Zhai HL. Tchebichef image moment approach to the prediction of protein secondary structures based on circular dichroism. Proteins 2018; 86:751-758. [DOI: 10.1002/prot.25509] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/29/2018] [Accepted: 04/14/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Sha Sha Li
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P.R. China
| | - Bao Qiong Li
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P.R. China
| | - Jin Jin Liu
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P.R. China
| | - Shao Hua Lu
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P.R. China
| | - Hong Lin Zhai
- College of Chemistry and Chemical Engineering; Lanzhou University; Lanzhou 730000 P.R. China
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Mabrouk MM, Hammad SF, El-Malla SF, Elshenawy EA. Simultaneous determination of amlodipine and metoprolol in their combined dosage form using a synchronous fluorescence spectrofluorimetric method. LUMINESCENCE 2017; 33:364-369. [DOI: 10.1002/bio.3422] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 09/21/2017] [Accepted: 09/23/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Mokhtar M. Mabrouk
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Sherin F. Hammad
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Samah F. El-Malla
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
| | - Eman A. Elshenawy
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy; Tanta University; Tanta Egypt
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