Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression
A method for simultaneous spectrophotometric determination of calcium and magnesium in mineral waters using multivariate calibration methods is proposed. The method is based on the development of the reaction between the analytes and Methylthymol Blue at pH 11. Two operational modes were used: stati...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p639_Blasco |
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todo:paper_00032654_v122_n7_p639_Blasco2023-10-03T13:55:38Z Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression Blasco, F. Medina-Hernández, M.J. Sagrado, S. Fernández, F.M. Calcium Flow injection Magnesium Mineral waters Multicomponent analysis Partial least-squares regression calcium dye magnesium mineral water accuracy analytic method article autoanalysis calibration controlled study data analysis drug concentration flow injection analysis intermethod comparison multivariate analysis ph regression analysis spectrophotometry water analysis Calcium Least-Squares Analysis Magnesium Mineral Waters Multivariate Analysis Sensitivity and Specificity Spectrophotometry A method for simultaneous spectrophotometric determination of calcium and magnesium in mineral waters using multivariate calibration methods is proposed. The method is based on the development of the reaction between the analytes and Methylthymol Blue at pH 11. Two operational modes were used: static (spectral information) and flow injection (FI) (spectral and kinetic information). The selection of variables was studied. A series of synthetic solutions containing different concentrations of calcium and magnesium were used to check the prediction ability of the partial least-squares models. The method was applied to the analysis of mineral waters and the results were compared with those obtained by complexometry. No significant differences at the 95% confidence level were found. The proposed method is simple, accurate and reproducible, and it could be easily adapted as a portable (static mode) or automatic (FI) method. Fil:Fernández, F.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p639_Blasco |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Calcium Flow injection Magnesium Mineral waters Multicomponent analysis Partial least-squares regression calcium dye magnesium mineral water accuracy analytic method article autoanalysis calibration controlled study data analysis drug concentration flow injection analysis intermethod comparison multivariate analysis ph regression analysis spectrophotometry water analysis Calcium Least-Squares Analysis Magnesium Mineral Waters Multivariate Analysis Sensitivity and Specificity Spectrophotometry |
| spellingShingle |
Calcium Flow injection Magnesium Mineral waters Multicomponent analysis Partial least-squares regression calcium dye magnesium mineral water accuracy analytic method article autoanalysis calibration controlled study data analysis drug concentration flow injection analysis intermethod comparison multivariate analysis ph regression analysis spectrophotometry water analysis Calcium Least-Squares Analysis Magnesium Mineral Waters Multivariate Analysis Sensitivity and Specificity Spectrophotometry Blasco, F. Medina-Hernández, M.J. Sagrado, S. Fernández, F.M. Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| topic_facet |
Calcium Flow injection Magnesium Mineral waters Multicomponent analysis Partial least-squares regression calcium dye magnesium mineral water accuracy analytic method article autoanalysis calibration controlled study data analysis drug concentration flow injection analysis intermethod comparison multivariate analysis ph regression analysis spectrophotometry water analysis Calcium Least-Squares Analysis Magnesium Mineral Waters Multivariate Analysis Sensitivity and Specificity Spectrophotometry |
| description |
A method for simultaneous spectrophotometric determination of calcium and magnesium in mineral waters using multivariate calibration methods is proposed. The method is based on the development of the reaction between the analytes and Methylthymol Blue at pH 11. Two operational modes were used: static (spectral information) and flow injection (FI) (spectral and kinetic information). The selection of variables was studied. A series of synthetic solutions containing different concentrations of calcium and magnesium were used to check the prediction ability of the partial least-squares models. The method was applied to the analysis of mineral waters and the results were compared with those obtained by complexometry. No significant differences at the 95% confidence level were found. The proposed method is simple, accurate and reproducible, and it could be easily adapted as a portable (static mode) or automatic (FI) method. |
| format |
JOUR |
| author |
Blasco, F. Medina-Hernández, M.J. Sagrado, S. Fernández, F.M. |
| author_facet |
Blasco, F. Medina-Hernández, M.J. Sagrado, S. Fernández, F.M. |
| author_sort |
Blasco, F. |
| title |
Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| title_short |
Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| title_full |
Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| title_fullStr |
Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| title_full_unstemmed |
Simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| title_sort |
simultaneous spectrophotometric determination of calcium and magnesium in mineral waters by means of multivariate partial least-squares regression |
| url |
http://hdl.handle.net/20.500.12110/paper_00032654_v122_n7_p639_Blasco |
| work_keys_str_mv |
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| _version_ |
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