Coulochem® cell models

Modular isocratic HPLC with ED detection HPLC pump 515 (Waters), Injector 7725i (Rheodyne), Pulsation Reduced (Portman Instruments), Coulochem Detector Model 5100A (ESA), Analytical Cell 5011 (ESA), and PC with chromatography software (SCPA). 

Detector E, ESA Coulochem II, Model 5011 dual analytical cell, upstream +0.65 V, downstream +0.85 V (monitored), analytical cell protected by an ESA carbon in-line filter... 

Detector E, Environmental Sciences Assoc. Coulochem II, Model 5011 detector cell, oxidative screen mode, screen electrode -1-0.25 V, sample electrode -1-0.5 V... 

Detector E, ESA Model 5100A Coulochem detector. Model 5011 analytical cell, detector 1 +0.50 V, detector 2 +0.70 V... 

At present the ESA Coulochem is the only commercially available coulometric detector. Several different types of cell are now available, most of which contain two analytical electrodes in series. The standard cell (Model 5010) contains equal sized PGEs, but in the high sensitivity cell (Model 5011) the surface area of the second electrode is reduced with the aim of producing a better S/N ratio. Despite the argument that the increased surface area available in PGE systems only increases the noise in proportion to the increased signal," such systems do appear to give an enhanced S/N ratio in certain applications, as compared to glassy carbon electrodes in thin-layer or wall-jet assemblies, and may offer more flexibility in routine use. Even better S/N ratios are claimed for the Model 5014 cell, which has been developed specifically for use with microdialysis samples. 

Detector E, Coulochem 5100A, conditioning cell Model 5021 -I- 400 mV, analytical cell Model 5011, first electrode —100 mV, second electrode (recording electrode) —400 mV... 

Detector E, ESA Coulochem Model 5100A, guard cell Model 5020 - - 0.7 V, anal5d ical cell Model 5010, channel 1 + 0.28 V, channel 2 - - 0.6 V... 

In-line high-pressure pre-filter assemblies with ESA carbon filter element Model 5100A Coulochem Detector with Model 5010 analytical cell and Model 5020guard cell ESA, Inc. 

Figure 8.1. Representative serial EC-LC-MS configurations using either ESA model 5021A or 5030 coulometric EC cell controlled with Coulochem III for MS detector (ESA Biosciences,...

Detector E, ESA Coulochem model 5100 A, Model 5020 guard cell, guard cell 0.3 V, detector 0.55 V for first electrode and 0.70 V for second electrode... 

Detector E, ESA Coulochem, Model 5010 analytical cell, detector cell 1 -1-0.20 V, detqctor cell 2 -I- 0.55 V, model 5020 guard cell -(- 0.75 V UV 210... 

Detector UV 254 E, ESA Coulochem Model 5100A, Model 5020 guard cell -0.8 V (placed before the injector), Model 5010 dual-electrode analytical cell with glassy-carbon electrodes (-0.8 V first electrode, -1-0.8 V second electrode)... 

Detector E, ESA Coulochem Model 5100A, Model 5020 guard cell before injector 4-1.0 V, model 5011 dual electrode analytical cell, screen electrode (detector 1) 4-0.65 V, sample electrode (detector 2) 4-0.85 V, ESA carbon filters before guard and analytical cells... 

Detector E, ESA Model 5100A Coulochem, model 5020 guard cell -1-950 mV, Model 5010 analytical cell + 400 mV, palladium reference electrode, following post-column photolysis. The effluent from the column flowed through a 20 m X 0.3 mm coil of PTFE tubing irradiated at 254 nm with a Sylvania GTE 8 W low-pressure lamp to the detector. 

Detector E, ESA Coulochem Model 5100 A, Model 5010 analjdical cell, first (screen) electrode 0.68 V, second (measuring) electrode 0.98 V, Model 5020 guard cell (before injector)... 

Figure 3.9 Schematic diagram of the Coulochem Model 5010 Cell, showing the relative positions of the working electrodes (PGEs) and counter and reference (Pd) electrodes.

Detector E, ESA Model 5100A Coulochem, first electrode -1-0.4 V, second electrode (which was monitored) -1-0.7 V, Model 5020 guard cell after pump but before injector at -hO.75 V... 

Detector E, Environmental Sciences Coulochem Model 5100A, porous graphite electrode - 0.50 V (screen), porous graphite electrode -1-0.76 V (monitored), guard cell -1-0.95 V (before injector)... 

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