Record Display for the EPA National Library Catalog

RECORD NUMBER: 34 OF 35

OLS Field Name OLS Field Data
Main Title Study to Improve Dissolved Oxygen Analysis Techniques to Facilitate Water Quality Field Survey Applications.
Author Raibl, R. W. ; Testerma, M. K. ;
CORP Author Arkansas Univ., Fayetteville. Water Resources Research Center.
Year Published 1973
Report Number Pub-13; DI-14-31-0001-3804; OWRR-A-017-ARK; 10559,; A-017-ARK(1)
Stock Number PB-221 019
Additional Subjects ( Water analysis ; Oxygen) ; ( Dissolved gases ; Measuring instruments) ; Corrections ; Calibration ; Compensation ; Temperature ; Design ; Circuits ; Electrodes ; Membranes ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-221 019 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 81p
Abstract
Many measurements of dissolved oxygen in water need to be made in field situations where recalibration techniques would be difficult and where making temperature corrections is time consuming for operators who may be making numerous measurements. This study was directed toward design of a compensation circuit for a dissolved oxygen electrode which will give the best possible measurement over a large water temperature range of 5C-35C without the necessity of recalibration. Studies were made of the temperature characteristics of dissolved oxygen probes and several electronic circuits with different configurations and components are described. Experimental data using two of the circuits are reported. One method involved using an integrated circuit multiplier module. The best temperature compensation was obtained for a circuit based on a design in which two thermistors were incorporated.