Anodic Stripping Voltammetric Determination of Hg2+Using 1-(2-pyridylazo)-2-Naphthol-modified Glassy Carbon Electrode
LIU Bo
FU Ding-qiang
NIU Ming-ming
BU Mei-ling
HUANG Wen-sheng
Abstract：1-( 2-pyridylazo )-2-naphthol-modified glassy carbon electrode has been investigated to de-tect trace levels of Hg2+.Hg2+are preconcentrated on the surface of the 1-(2-pyridylazo) -2-naphthol-modified glassy carbon electrode at -0.80 V(vs.SCE), and subsequently reduced on the electrode .In the following step , reduced mercury is oxidized , and voltammograms are recorded by scanning the poten-tial towards a positive direction .The peak currents are linear with the concentrations in the range from 2. 0×10-9 mol/L to 9.0×10-7 mol/L for Hg2+.The detection limits are 6×10-10 mol/L for Hg2+.The coeffi-cients of variation, determined on one single electrode at a concentration of 5×10-7 mol/L Hg2+,have been calculated to be 2.8%for Hg2+(n=8).Using this kind of modified electrode, trace levels of Hg2+in several water samples are determined , and the average recovery is 99.88%.
Keywords：1-( 2-pyridylazo )-2-naphtholchemically modified electrodesmercuryvoltammetry
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 57-59 )