University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Terrence P. Tougas

Abbrev:
Tougas, T.P.
Other Names:
Address:
Polaroid Corporation, Waltham, Massachusetts 02254, U.S.A.
Phone:
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Citations 5

"Automated Measurement Of Dye Coverage In Photographic Negatives By Flow Injection Analysis"
Talanta 1992 Volume 39, Issue 3 Pages 313-318
Terrence P. Tougas* and Kathleen M. Hobbs

Abstract: The sample was extracted with DMSO followed by determination of the yellow, magenta and cyan dyes at 459, 554 and 678 nm, respectively. The coefficient of variation for peak-area determinations (n = 10) were 1.0 to 1.2%. A system was designed to automate the determination of three image dyes in an instant photog. material. The method involves extracting negative samples with DMSO and filtering the extract, followed by quantitating the dye coverage (dye per unit area of negative) through a spectrophotometric flow injection procedure. Significant spectral overlap exists among the dyes, and as a result calculation of coverage requires solving three simultaneous equations. A microcomputer and data acquisition system were employed for controlling the detector and flow injection system, acquiring and integrating the detector response, calculating coverage, producing and displaying control charts, and automatically transferring results to a VAX based corporate database. In addition to automating sample preparation and measurement steps as much as possible, the goal of this project was to automate the data manipulation and transfer steps.
Dyes, photographic Film Spectrophotometry Computer

"Recent Developments In Electrochemical Detection For Flow Injection Analysis"
Int. Lab. 1988 Volume 18, Issue 1 Pages 18-30
Tougas, Terrence P. (SFS)

Abstract: A review with 64 references. (SFS)
Electrochemical analysis Review

"Theoretical And Experimental Response Of A Biamperometric Detector For Flow Injection Analysis"
Anal. Chem. 1985 Volume 57, Issue 7 Pages 1377-1381
T. P. Tougas, J. M. Jannetti, and W. G. Collier

Abstract: The detector consists of two opposing platinum electrodes in contact with the carrier stream. A p.d. of 10 to 500 mV is applied between the electrodes and the resulting current is measured. The current can flow only when both reduced and oxidized forms of a couple are present in the cell. The method is demonstrated with the Fe(CN)63- - Fe(CN)64- couple, and was applied to the determination of Fe(II) in multivitamin preparations, the results agreeing closely with those obtained by the phenanthroline method.
Iron(2+) Pharmaceutical Amperometry Electrode Method comparison Theory

"Simultaneous Determination Of Multiple Components In Flow Injection Systems By Square-wave Amperometry"
Anal. Chim. Acta 1987 Volume 192, Issue 2 Pages 327-331
T. P. Tougas and C. Y. Yuan

Abstract: Ions of Cu, Cd, Zn and Pb were detected in a flow injection system with 0.1 M acetate buffer (pH 4.5) as carrier stream. The flowcell detector included a potentiostat, a static-mercury-drop electrode and a silver - AgCl reference electrode. A computer was used to superimpose a square wave on the applied staircase potential. Currents were sampled every 250 µs from each square wave to evaluate the current - time responses. The response of each ion was independent of the concentration. of the other ions. Rectilinear calibrations were obtained over the range 0.05 to 10 mg mL-1 and detection limits were 11, 13, 8 and 8 µg mL-1 for Cu, Cd, Zn and Pb, respectively.
Copper Cadmium Lead Zinc Amperometry Electrode Computer

"Recent Developments In Electrochemical Detection For Flow Injection Analysis"
Am. Lab. 1987 Volume 19, Issue 1 Pages 38-48
Tougas, T.P.

Abstract: A review with 64 references. (SFS)
Electrochemical analysis Review