Preliminary investigation on the use of carbon paste electrode modified with potato (Solanum tuberosum L.) tuber in voltammetric determination of lead (II) ions

Date

6-2005

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Elmer Rico E. Mojica

Co-adviser

Jose Rene L. Micor

Committee Member

Teofila DC Villar

Abstract

The use of carbon paste electrode modified with potato tuber or potatrode in determination of lead was evaluated using two electrochemical techniques: cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DPASV). potatrode demonstrated ability to hind lead (11) ions and gave sharp, well-defined peaks corresponding to lead upon DPASV analyses. The optimum working conditions of the potatrode were the following: 30% (w/w) modifier, 0.1 M 11C1 as the supporting electrolyte. 180 seconds accumulation time, 30 seconds deposition time, 40 mV/s sweep rate and —800 mV deposition potential. Multiple stripping and chelation with 0.1 M EDTA regenerated the electrode surface. The limit of detection (LOD) and limit of quantification (1.0Q) of the potatrode are 0.2332 and 0.7775 ppm respectively. Employment of the potatrode in determination of lead present in an ERG laboratory waste sample gave a concentration of 1.495 ppm.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2005 C4 M35

Document Type

Thesis

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