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Regression by least median squares in the calculation of transition times for calibration in chronopotentiometry
Author(s) -
Ortiz María C.,
Palacios Jesús López,
Sarabia Luis A.,
Piangerelli Maria G.,
Cingolani Deborah
Publication year - 1996
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140081015
Subject(s) - calibration , outlier , least squares function approximation , mathematics , calibration curve , statistics , partial least squares regression , analytical chemistry (journal) , chemistry , detection limit , chromatography , estimator
The ability of the least median squares (LMS) method in detection of several straight segments in experimental continuous curves is tested using chronopotentiometric data. As a common experimental system, the chronopotentiometric reduction of Fe(CN) 6 3−on a Pt electrode is used for this purpose. LMS allows for the correct estimation of transition times and then, for the calibration of the system. LS calibration without outliers detected by LMS assures a better prediction and therefore better calibration quality, because the standard error of estimation is 32.43% less than one obtained with the whole data.