Prev. Article Next Article Table of Contents

Article

A Low-Cost and High-Performance Conductivity Meter

Citing Articles

Your current credentials do not allow retrieval of the full text.

Purchase the full-text

PDF/HTML,
figures/images,
references and tables,
(where available)

Rogerio T. da Rocha , Ivano G. R. Gutz and Claudimir L. do Lago

Departamento de Quimica Fundamental, Instituto de Química, Universidade de Sao Paulo, C.P. 26.77, 05599-970 , Sao Paulo - SP, Brazil

J. Chem. Educ., 1997, 74 (5), p 572

DOI: 10.1021/ed074p572

Publication Date (Web): May 1, 1997

Section:

History, Education, and Documentation

Abstract

A two-electrode conductivimeter is described, which keep good performance in spite of its low cost. It is composed of a triangular wave generator, a current-to-voltage converter, and a precision half-wave rectifier. All these functions were implemented with only one integrated circuit TL084. A 3 1/2-digits multimeter is used as the display. Four scales allow measurements over a wide range of conductance (0.01 µS to 19.99 mS). To ensure the low cost and robustness, a stainless steel electrode was developed. The low amplitude and high frequency of the oscillator allow good measurements with this kind of electrode, giving, in some cases, even better results than commercial ones. Anyway, platinum electrode is the better choice for very oxidant media. Electronic diagrams and complete list of components as well as examples of applications are shown.

Keywords (Audience):

High School / Introductory Chemistry

Keywords (Domain):

Analytical Chemistry

Keywords (Subject):

Instrumental Methods

View: Hi-Res PDF | PDF w/ Links

Citing Articles

View all 4 citing articles

Citation data is made available by participants in CrossRef's Cited-by Linking service. For a more comprehensive list of citations to this article, users are encouraged to perform a search in SciFinder.

This article has been cited by 4 ACS Journal articles (4 most recent appear below).

Charge Density Quantification of Polyelectrolyte Polysaccharides by Conductometric Titration: An Analytical Chemistry Experiment
Stefano Farris, Luigi Mora, Giorgio Capretti, and Luciano Piergiovanni
Journal of Chemical Education2012 89 (1), 121-124
- Charge Density Quantification of Polyelectrolyte Polysaccharides by Conductometric Titration: An Analytical Chemistry Experiment
  Stefano Farris, Luigi Mora, Giorgio Capretti, and Luciano Piergiovanni
  Journal of Chemical Education2012 89 (1), 121-124
  An easy analytical method for determination of the charge density of polyelectrolytes, including polysaccharides and other biopolymers, is presented. The basic principles of conductometric titration, which is used in the pulp and paper industry as well as ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
K. Christopher Smith, Etinosa Edionwe, and Bayyinah Michel
Journal of Chemical Education2010 87 (11), 1217-1221
- Conductimetric Titrations: A Predict−Observe−Explain Activity for General Chemistry
  K. Christopher Smith, Etinosa Edionwe, and Bayyinah Michel
  Journal of Chemical Education2010 87 (11), 1217-1221
  A predict−observe−explain framework is used to explore conductimetric titrations of a hydrochloric acid−sodium hydroxide (strong acid−strong base) and an acetic acid−sodium hydroxide (weak acid−strong base) system in which all components are soluble. In ...
  Abstract | Full Text HTML | Hi-Res PDF | PDF w/ Links
A Computer-Controlled Bipolar Pulse Conductivity Apparatus
N. Papadopoulos and M. Limniou
Journal of Chemical Education2001 78 (2), 245
- A Computer-Controlled Bipolar Pulse Conductivity Apparatus
  N. Papadopoulos and M. Limniou
  Journal of Chemical Education2001 78 (2), 245
  A laboratory apparatus for ion conductivity measurements is described. This apparatus is controlled by a personal computer. We use commercial interface A/D D/A cards with very satisfactory results. The accuracy of this instrument is 0.5 percent. It is ...
  Abstract | Hi-Res PDF | PDF w/ Links
Hand-Held Conductivity Meter and Probe for Small Volumes and Field Work
Barry R. Ganong
Journal of Chemical Education2000 77 (12), 1606
- Hand-Held Conductivity Meter and Probe for Small Volumes and Field Work
  Barry R. Ganong
  Journal of Chemical Education2000 77 (12), 1606
  A portable conductivity meter and probe are described. They have a unique combination of features that permits use with small volumes in the laboratory or in the field. The probe consists of two graphite electrodes embedded in a rigid plastic tube with a ...
  Abstract | Hi-Res PDF | PDF w/ Links