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Determination of arsenic by stripping potentiometry on gold electrodes using partial least‐squares (PLS) regression calibration
Author(s) -
Jagner Daniel,
Renman Lars,
Stefansqottir Svana H.
Publication year - 1994
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.1140060305
Subject(s) - partial least squares regression , arsenic , stripping (fiber) , chemistry , calibration , analytical chemistry (journal) , copper , reagent , calibration curve , tin , electrode , standard addition , materials science , chromatography , detection limit , mathematics , statistics , organic chemistry , composite material
Abstract Partial least‐squares (PLS) regression calibration was applied to the determination of arsenic by stripping potentiometry on gold electrodes. In a procedure involving the direct electrochemical reduction of arsenic (V), this allowed interferences from copper (II), due to formation of intermetallic compounds, and tin (IV), due to stripping peak overlaps, to be modeled. At levels of arsenic below 1 μg L −1 , additional problems with the gold surface background, as well as copper interferences from a reagent blank, could be successfully modeled, and the prediction of sample concentrations could be accurately performed.