Author/Authors :
Chandra، Sulekh نويسنده Department of Chemistry, Zakir Husain College,University of Delhi, J.L.N.Marg, New Delhi-110002, India , , Malik، Amrita نويسنده Department of Chemistry, Zakir Husain College (University of Delhi) J. L. Nehru Marg, New Delhi-110002, India , , Tomar، Praveen Kumar نويسنده Department of Chemistry, Zakir Husain College (University of Delhi) J. L. Nehru Marg, New Delhi-110002, India , , Kumar، Avdhesh نويسنده Department of Chemistry, Zakir Husain College (University of Delhi) J. L. Nehru Marg, New Delhi-110002, India , , Sadwal، Sangeeta نويسنده Department of Chemistry, Zakir Husain College (University of Delhi) J. L. Nehru Marg, New Delhi-110002, India ,
Abstract :
A new perchlorate selective poly(vinyl chloride) membrane electrode based on a
cobalt(II) complex of p-Hydroxyacetophenonesemicarbazone as an ionophore was prepared.
The electrode shows Nernstian slope of 59.6±0.3 mV/decade with improved linear range of
1.0×10-7 to 1.0×10-1 M, with a comparatively lower detection limit 5.4×10-8 M between pH
range of 2.0-10, giving a relatively fast response within ?8 s and can be used for at least 13
weeks without any divergence in potential. The selectivity coefficient was calculated using
matched potential method. The electrode can also be used in partially non-aqueous media
having up to 20% (v/v) methanol, ethanol or acetone content with no significant change in the
value of slope or working concentration range. It was successfully applied for the direct
determination of perchlorate content in water and human urine samples.
