EG G Princeton Applied Research

EG G Princeton Applied Research (Analytical Instrument Division), Application Note C-3, Operating Parameters for Optimization of the Model 310, 1980. 

EG G Princeton Applied Research (Applied Instruments Group), Application Note F-2, Applications of Voltammetry to the Food Industry, 1982. 

Many handbooks like the CRC Handbook of Chemistry and Physics provide, on behalf of electrochemistry investigation, values of standard reduction potentials, listed either in alphabetical order and/or in potential order. These must be considered as potentials of completely reversible redox systems. In current analytical practice one is interested in half-wave potentials of voltammetric, mostly polarographic analysis in various specific media, also in the case of irreversible systems. Apart from data such as those recently provided by Rach and Seiler (Spurenanalyse mit Polarographischen und Voltammetrischen Methoden, Hiithig, Heidelberg, 1984), these half-wave potentials are given in the following table (Application Note N-l, EG G Princeton Applied Research, Princeton, NJ, 1980). 

EG G Princeton Applied Research Application Briefs and Application Notes. 

The electrode potential was controlled with an EG G Princeton Applied Research (PAR) model 173 potentiostat/galvanostat and is referenced to a saturated calomel electrode (SCE). A PAR model 276 current-to-voltage converter allowed monitoring of current during the ORC and SERS experiments and it also provided for positive feedback iR compensation for accurate potential control. 

Spex II, Model 1403) with 1800 grooves mm-i holographic gratings coupled to a photomultiplier (RCA) with associated electronics (EG G Princeton Applied Research, Model 1112). 

A Table of Selected Half-Wave Potentials for Inorganic Substances, Application Note H-l, EG G Princeton Applied Research, Princeton, New Jersey. 

EG G Princeton Applied Research P.O. Box 2565 Princeton, NJ 08543-2565 Instrumentation, electrodes, cells, accessories... 

The static mercury drop electrode (SMDE) was first introduced commercially in the late 1970s by EG G Princeton Applied Research [27]. It utilizes a method of drop formation in which the mercury drop is dispensed rapidly and then allowed to hang stationary at the capillary tip. When used in a DME mode of operation, the drops can be repetitively formed and dislodged at desired time... 

Metrohm and BAS have also introduced improved DME models capable of operating in the SMDE mode. The Metrohm electrode (Fig. 14.6b) has a needle valve and small-bore capillary. Much of it is pneumatically controlled. The BAS version (Fig. 14.6c) is called the controlled growth mercury electrode (CGME). It is based on the work of Kowalski, Osteryoung, and coworkers [30]. Its features include a low-resistance electrical contact to the mercury thread in the capillary via a stainless steel tube and a fast response valve. The fast valve has allowed unique experiments to be performed where precise control of mercury drop growth during the experiment is desirable [31-33]. The BAS (Fig. 14.7), EG G Princeton Applied Research (Fig. 14.8), and Metrohm (Fig. 14.9) electrodes offer this easy and reproducible drop renewal in fully equipped cell stands. 

Figure 14.6 Cross-sectional views of (a) the EG G Princeton Applied Research model 303A SMDE (b) Metrohm s electrode, featuring a needle valve and small-bore capillary and (c) the BAS controlled growth mercury electrode.

Multilayer depositions may be performed using, say, an EG G Princeton Applied Research (PAR) Model 173 potentiostat/galvanostat with a PAR Model 276 interface providing computer control capability. A PC furnished with a GPIB-... 

The electronic tongue system based on flow injection analysis (FIA) with two amperometric detectors was set up. The FLA apparatus consisted of a Jasco (Tokyo, Japan) model 880 PU pump and two EG G Princeton Applied Research (Princeton, NJ, USA) Model 400 thin-layer electrochemical detector connected in series. Each detector was equipped with a working electrode (a dual glassy carbon electrode and a gold... 

Apparatus Cyclic voltammetry and amperometric current-time curves were obtained with a Pine Instrument Inc., Model RDE4 bipotentiostat and Kipp Zonen BD 91 XYY recorder equipped with a time base module. All measurements were performed in a conventional single-compartment cell with a saturated calomel electrode as the reference electrode and a Pt mesh as the auxiliary electrode at room temperature. Chronoamperometry was made with EG G Princeton Applied Research potentiostat/galvanostat Model 273 equipped with Model 270 Electrochemical Analysis Software. 

Apparatus and materials. All electrochemical polymerizations, amperometric measurements and cyclic voltammetry were carried out with an EG G Princeton Applied Research Potentiostat model 273. Pyrrole was purified by vacuum distillation and by passage over neutral alumina prior to electropolymerization. The polyanions (1) used as dopants are shown in Figure 1, and were purified twice by precipitation from methanol in 0.1 M HC1. Detailed information about their synthesis and catalytic... 

To acquire this information, the two displaced continuum beams are imaged with a cylindrical and a spherical lens onto different positions along the length of the entrance slit of a low dispersion spectrograph (Instruments SA, model UFS-200). The two resulting parallel dispersed spectra are fully separated from each other at the focal plane, where they are detected by the model 1254 SIT detector head of an EG + G Princeton Applied Research Corporation optical multichannel analyzer system. In conjunction with a model 1216 detector controller and model 1215 console, this detector is programmed with a two dimensional... 

OMA 2 Multichannel Spectroscopy Equipment Brochure EG G Princeton Applied Research Corporation Princeton, NJ, 1981. Rarasek, F. W. Res./Dev. 1972, 24. 

Scanning grating Bran Leubbe EG G Princeton Applied Research Foss-NIRSystems Guided Wave, Inc. Hitachi Instruments, Inc. L.T. Industries Shimadzu Trebor Industries Tecator AB Varian... 

Accousto-optic tunable filter Bran Leubbe Brimrose Corp. EG G Princeton Applied Research Infrared Eiber Systems L.T. Industries Rosemont... 

The CSV titrations were performed using a BAS 100 electrochemical system and an EG G Princeton Applied Research 303A static mercury drop electrode. The procedure was essentially that of Van den Berg (18) except that the catechol concentration was 1 x 10 M. 

Electrochemical Measurements. Cyclic voltammetry and alternating current (ac) impedance spectroscopy were performed using an ac impedance system (EG G Princeton Applied Research model 378) that included a potentiostat-galvanostat (model 273), a two-phase lock-in analyzer (model 5208), and an IBM PS/2 computer. For ac impedance measurements, a 5-mV sine wave was superimposed on an applied voltage bias from the potentiostat. The reference electrodes were saturated calomel electrodes (SCE Fisher) for measurements in aqueous solution and silver electrodes... 

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