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Piecewise Direct Standardization Method Applied to the Simultaneous Determination of Pb(II), Sn(IV) and Cd(II) by Differential Pulse Polarography
Author(s) -
Herrero Ana,
Cruz Ortiz M.
Publication year - 1998
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/(sici)1521-4109(199808)10:10<717::aid-elan717>3.0.co;2-r
Subject(s) - piecewise , polarography , calibration , partial least squares regression , analytical chemistry (journal) , differential (mechanical device) , standardization , pulse (music) , chemistry , segmented regression , multivariate statistics , mathematics , regression analysis , statistics , computer science , chromatography , nonlinear regression , mathematical analysis , physics , thermodynamics , inorganic chemistry , detector , telecommunications , operating system
A partial least squares (PLS) regression has been used to carry out the simultaneous determination of Pb II , Sn IV and Cd II by differential pulse polarography (DPP) because overlapping peaks exist. But this multivariate regression requires the measurement of a large number of calibration samples, so a standardization procedure, the piecewise direct standardization (PDS) method, has been used in order to reduce the experimental effort that will be necessary in later analysis. The number of calibration samples has been reduced by about 60 %, the results being comparable to those obtained with a full recalibration.