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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Stanley Bruckenstein

Abbrev:
Bruckenstein, S.
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Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14214
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Citations 3

"Dual Porous Electrode Membrane Cell For Detection Of Non-electroactive Species In Flowing Streams"
Anal. Chem. 1987 Volume 59, Issue 18 Pages 2260-2263
Antonin Trojanek and Stanley Bruckenstein

Abstract: A dual electrode detector capable of being used in flowing streams is described. One electrode generates a volatile reagent from a constituent present In the flowing stream, which then reacts with a dissolved analyte also present In the flowing stream. Excess volatile reagent diffuses through a non-wetting porous membrane to a second electrode at which the unreacted volatile reagent Is determined by constant potential electrolysis. The utility of this detector Is demonstrated by the determination of allyl alcohol with electrogenerated bromine In the range 23-697 ng of allyl alcohol.
Allyl alcohol Water Amperometry Electrode Apparatus

"Flow Injection Analysis Of Volatile, Electroinactive Organic Compounds At A Platinum Bas Diffusion Membrane Electrode By Use Of A Redox Mediator"
Anal. Chem. 1986 Volume 58, Issue 4 Pages 981-982
Antonin Trojanek and Stanley Bruckenstein

Abstract: The proposed procedure is based on the use of a detector cell similar to that described earlier (see section B of this issue, under nitrogen). In the determination of acetone, a portion of acetone solution is injected into a carrier stream (0.5 mL min-1) of water which passes to an electrochemical cell fitted with a platinum gas-permeable membrane electrode. Acetone diffuses through the membrane and causes reduction of Os(VIII) in the supporting electrolyte of the cell. The resulting Os(VI) is re-oxidized to Os(VIII) at the platinum electrode at an applied potential of +0.3 V vs. the SCE. Calibration graphs (oxidation current vs. concentration. of acetone) are rectilinear in the range 5 to 4000 ng, and at the 157 ng level the coefficient of variation is 0.8% (n = 12). Analyses of aqueous solution of methanol and ethanol also yield rectilinear calibration graphs. The sampling rate is 40 h-1.
Acetone Ethanol Methanol Amperometry Electrode Electrode Gas diffusion

"Novel Flow-through Pneumatoamperometric Detector For Determination Of Nanogram And Sub-nanogram Amounts Of Nitrite By Flow Injection Analysis"
Anal. Chem. 1986 Volume 58, Issue 4 Pages 866-869
Antonin Trojanek and Stanley Bruckenstein

Abstract: The pneumato-amperometric technique described previously (cf. Beran et al., Anal. Abstr., 1982, 43, 5H57) has been modified for use in flow injection analysis. The detecting electrode consists of a porous gold film deposited on one side of a gas-permeable PTFE membrane. Volatile electroactive species formed in the carrier stream diffuse through the membrane and are electrolysed at the electrode. In the determination of NO2-, the sample (20 µL) is injected into a 10 mM KI carrier stream (0.5 mL min-1) and the resulting NO and iodine diffuse through the membrane and are oxidized to NO3- and IO3-, respectively, at the electrode. A potential of +1.35 V (vs. the SCE) is applied to the gold electrode and the supporting electrolyte is 0.1 M H2SO4. Calibration graphs are rectilinear in the range 0.09 to 138 ng of NO2- and the limit of detection is 30 pg. For 69 pg of NO2- the coefficient of variation is ~0.5% (n = 15). In a less sensitive procedure, 1 to 4000 ng of NO2- can be determined by injecting the sample into a carrier stream of 0.1 M H2SO4. In either procedure the sampling rate is 100 h-1.
Nitrite Amperometry Electrode Pneumatic Teflon membrane