Semi-quantitative analysis of copper (ll) in aqueous systems using a Diethyldithiocarbamate (DEDTC)-paper based chemical sensor

Date

4-2004

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Norriel S Nipales

Abstract

Quintana, Jennifer Barra, College of Arts and Sciences, University of the Philippines Los Banos, April 2005. Semi-Quantitative Analysis of Copper (II) in Aqueous Systems using a Diethyldithiocarbamate (DEDTC)-Paper Based Chemical Sensor. Adviser: Dr. Norriel S. Nipales

Optimization of several conditions was conducted for the preparation of the diethyldithiocarbamate copper (II) sensor. Determination of suitable solid support for the construction of the chemical sensor was made using four types of paper- book papers, linen papers, smooth-surfaced typewriting papers and thicker papers. Book papers were determined to be the most suitable solid support. Optimum pH of standard copper (II) solution to be used for the sensor was determined to be between pH 3 and pH 4. Several heavy metal solutions such as As', Bi', Cd', Co', Cr", Fe', Hg2+, Pb',2 Sn' and Zn 2+ may interfere in the use of the sensor for copper (II) analysis. In particular, the ones that produce colored complexes with DEDTC like cobalt (II), dull green; bismuth (II), yellow; and iron (III), brown-black. Stability of the DEDTC- paper based sensor was studied for 24 weeks. Based on the colors produced, the sensors were determined to be stable for one week. Copper (II) of water samples from a farm irrigation of Bilian, Pagsanjan, Laguna, Pasig River, Laguna Bay, lab waste from ERG Materials Laboratory and lab waste from an industrial company were analyzed semi-quantitatively using the DEDTC-paper based sensor. Concentrations of copper (II) from Pagsanjan farm irrigation, Pasig River, Laguna Bay water samples and lab waste of an industrial company ranged from 0.1 — 0.3 mg/L. On the other hand, concentration of the copper (II) from ERG Materials Laboratory showed concentration ranged from 80-150 mg/L. The copper (II) concentration obtained from AAS analysis confirmed the low concentrations of copper (II) present in Pagsanjan farm irrigation, Pasig River, Laguna Bay water samples and lab waste of an industrial company. High concentration of copper (II) from the ERG Materials Laboratory was also confirmed by the analysis.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2005 C4 Q56

Document Type

Thesis

This document is currently not available here.

Share

COinS