|
KMID : 1059519910350050545
|
|
Journal of the Korean Chemical Society
1991 Volume.35 No. 5 p.545 ~ p.552
|
|
|
Determination of Hg (II) Ion at a Chemically Modified Carbon Paste Electrode Containing L-Sparteine
|
|
Jeong Euh-Duck
Won Mi-Sook
Shim Yon-Bo
|
|
|
Abstract
|
|
|
|
A mercury ion-sensitive carbon-paste electrode (CPE) was constructed with l-sparteine. Mercury (Ⅱ) ion was chemically deposited by the complexation with l-sparteine onto the CPE. The surface of CPEs was characterized by cyclic voltammetry and anodic stripping voltammetry in an acetate buffer solution, separately. Exposure of CPEs to acid solution could regenerate surface and reuse it for deposition. In 5 deposition/measurement/regeneration cycle, the response was reproducible and in licnear up to 2.0 × 10-6 M with linear sweep voltammetry. In case of using the differential pulse technique, we have obtained the linear response up to 7.0 × 10-7 M with relative standard deviation of ±5.1%. The detection limit was 5.O × 10-7 M for 20 minutes of the deposition. We have investigated the interference effect of various metal ions, which are expected to form the complex with ligand. Silver (Ⅰ) ion of these has interfered with the analysis of Hg (Ⅱ) ions. However, pretreatment of the silver (Ⅰ) ion with potassium chloride led to no interference on the analysis of mercury ions in aqueous solution.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|