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Determination of Hg II Ion with a 1,11‐Bis(8‐quinoyloxy)‐3,6,9‐trioxaundecane‐Modified Glassy Carbon Electrode Using Spin‐Coating Technique
Author(s) -
Kim HyunJung,
Park DeogSu,
Hyun MeongHo,
Shim YoonBo
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(199804)10:5<303::aid-elan303>3.0.co;2-a
Subject(s) - linear sweep voltammetry , anodic stripping voltammetry , analytical chemistry (journal) , electrode , detection limit , differential pulse voltammetry , voltammetry , materials science , glassy carbon , cyclic voltammetry , working electrode , electrochemistry , chemistry , inorganic chemistry , chromatography
A glassy carbon electrode modified with an open‐chain crown ether, 1,11‐bis(8‐quinolyloxy)‐3,6,9‐trioxaundecane (BQT), using a spin coating method, has been applied for the highly selective and sensitive analysis of trace amounts of Hg II . The modified electrode Hg II ion was spontaneously deposited on the modified electrode and the resulting surfaces were characterized by anodic stripping voltammetry. The linear sweep voltammogram of the modified electrode deposited with Hg II ion shows a well‐defined anodic peak at +0.17 V. The detection limit with linear sweep voltammetry was 1.0 × 10 −8 M and was about 7.0 × 10 −10 M Hg II by differential pulse anodic voltammetry. The response reproduced with a value of 6.1 % relative standard deviation. The presence of 20‐fold molar Ag I , Cd II , Pb II , Fe II , Ni II , Co II , Cu II , Al III , Mg II , Sb III , Ti II , and Zn II did not interfere in the analysis of Hg II ion except Fe II . The electrode has been successfully applied to the determination of trace amounts of the Hg II ion in the human urine sample.