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Over‐Oxidized Poly (Phenol Red) Film Modified Glassy Carbon Electrode for Anodic Stripping Voltammetric Determination of Ultra‐Trace Antimony (III)
Author(s) -
Karabiberoğlu Şükriye Ulubay,
Dursun Zekerya
Publication year - 2017
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.201600629
Subject(s) - antimony , stripping (fiber) , detection limit , anodic stripping voltammetry , calibration curve , phenol , electrode , chemistry , electrochemistry , analytical chemistry (journal) , dielectric spectroscopy , anode , nuclear chemistry , materials science , inorganic chemistry , chromatography , organic chemistry , composite material
Abstract In this study, we introduce a very sensitive and selective method for the differential pulse anodic stripping determination of Sb(III) ion on the over‐oxidized poly(phenol red) modified glassy carbon electrode (PPhRed ox /GCE) in 0.1 mol L ‐1 HCl medium. The formation of both poly(phenol red) and over‐oxidized poly(phenol red) film on the electrode surfaces were characterized by electrochemical impedance spectroscopy, X‐ray photoelectron spectroscopy and scanning electron microscopy techniques. An anodic stripping peak of Sb(III) was observed at 0.015 V on the PPhRed ox /GCE. Higher anodic stripping peak current of Sb(III) was obtained at PPhRed ox /GCE compared with both bare GCE and poly(phenol red) film modified GCE (PPhRed/GCE). The calibration graph consisted of two linear segments of 0.044 ‐ 1.218 μg L −1 and 3.40 – 18.26 μg L −1 with a detection limit of 0.0075 μg L −1 . The proposed over‐oxidized polymer film modified electrode was applied successfully for the analysis of antimony in different spiked water samples. Spiked recoveries for water samples were obtained in the range of 93.0–103.0%. The accuracy of the method was also verified through the analysis of standard reference materials (SCP SCIENCE‐EnviroMAT™ EP−L‐2).