Model 800B Series Electrochemical Detector                          <<<Home

The Model 800B series is designed for electrochemical detection. This instrument can be used for monitoring the current passing through a flow cell in liquid chromatography/electrochemistry and in-flow injection analysis, as well as other electroanalytical applications. Each instrument contains a digital function generator, a data acquisition system, and a potentiostat / bipotentiostat / Galvanostat (CHI840B/842B). The potential control range is 10 V and the current range is 10 mA. These instruments are capable of measuring currents down to picoamperes. This series is designed for analytical purposes that require high sensitivity and low noise levels. It has a maximum sampling rate of 25 kHz (200 kHz during iR compensation test). The circuitry has very low electrical noise, and 24-bit A/D converters are used to gain very high digitizing resolution. Multiple data acquisition systems allow an external input signal (such as spectroscopy signals to be recorded simultaneously with electrochemical data). When it is used for amperometric detection, three decades of current scales are plotted during the experiment to display signals of various magnitudes clearly. This model has superior ease of use compared with analog instruments, as well as data storage and analysis capabilities, without the need for recorder/baseline adjustments. It also provides a much larger current dynamic range, so that separate runs for large and weak signals can be avoided.

                The Model 80B is for single channel measurements, and the Model 82B contains a bipotentiostat and is for dual channel measurements. As a bipotentiostat, it is well suited to rotating ring-disk electrodes applications. It can also be used for other applications where dual channel measurements are essential. Dual channel measurements are available for CV, LSV, CA, DPV, NPV, SWV, and amperometric i-t curves.

                The model 800B series is our upgrade to the model 800 and 800A series. It has faster data acquisition (25 kHz versus 500 Hz for the older models), but still maintains the same quality during slow measurements. The potential range is significantly wider (10 V versus 2 V or 3.275 V with the older models). The iR compensation and a galvanostat have been added, as well as hardware current re-zero circuitry. Also the low-pass filter will have lower cutoff frequencies. FLASH memory capabilities and serial/USB communication are currently under development.

We provide several different models in the 800B series. The following table compares the different models. Other than what is listed, the specifications and features of these models are identical. Models 800B/802B and 810B/812B are mainly for flow cell detection. Models 820B/822B cannot be used for flow cell detection, but are intended for voltammetry applications. Models 830B/832B/840B/842B are comprehensive electrochemical analyzers that can be used for electrochemical detection, voltammetry, and other applications. Models 840B/842B also include a galvanostat. 

 

 

                Real time data display for flow cell detection.

 

Specifications

 

 

Potentiostat

Bipotentiostat

Galvanostat (840B/842B)

Potential range:  10 V

Compliance voltage:  12 V

Current: 0.01 A

3- or 4-electrode configuration

Input impedance of reference electrode:  1012 ohm

Sensitivity scale:  110-12 - 0.001 A/V in 10 ranges

Input bias current:  < 5 pA

Current measurement resolution:  < 0.01 pA

Fast data acquisition: 16 bit @ 25 kHz

Aux. data acquisition: 20 bit @ 1 kHz; 24 bit @ 10 Hz

External voltage signal recording channel

External potential input

Automatic and manual iR compensation

Potential and current analog output

 

CV and LSV scan rate:  110-6 to 25 V/s

CC and CA pulse width:  0.001 to 1000 sec

True integrator for CC

DPV and NPV pulse width: 0.001 to 10 sec

SWV frequency:  1 to 10 kHz

Dual channel measurements for CV, LSV, CA, DPV, NPV, SWV, i-t

Cell control: purge, stir, knock

Automatic potential and current zeroing

Current low-pass filters, covering 8-decade frequency range, Automatic and manual setting

RDE control output:  0-10V (corresponding to 0-10000rpm)

Flash memory for quick software update

Serial port or USB port selectable for data communication

Maximum data length:  128K - 4096K selectable

Dimension:  12.5(W) 11(D) 4.75(H)

Weight:  15 Lb.

                                                                                                                                                                                                       

 

      Differences Between 800B Series Models

 

Functions

800B/802B

810B/812B

820B/822B

830B/832B

840B/842B

Cyclic Voltammetry (CV)*

l

l

l

l

l

Linear Sweep Voltammetry (LSV) &,*

l

l

l

l

l

Chronoamperometry (CA)*

 

 

 

l

l

Chronocoulometry (CC)

 

 

 

l

l

Differential Pulse Voltammetry (DPV) #,&,*

 

 

l

l

l

Normal Pulse Voltammetry (NPV) #,&,*

 

 

l

l

l

Square Wave Voltammetry (SWV) &,*

 

 

l

l

l

Amperometric i-t Curve (i-t)*

l

l

 

l

l

Differential Pulse Amperometry (DPA)

 

l

 

l

l

Double Differential Pulse Amperometry (DDPA)

 

l

 

l

l

Triple Pulse Amperometry (TPA)

 

l

 

l

l

Bulk Electrolysis with Coulometry (BE)

 

 

l

l

l

Sweep-Step Functions (SSF)

 

 

 

 

l

Multi-Potential Steps (STEP)

 

 

 

 

l

Chronopotentiometry (CP)

 

 

 

 

l

Chronopotentiometry with Current Ramp (CPCR)

 

 

 

 

l

Multi-Current Steps (ISTEP)

 

 

 

 

l

Potentiometric Stripping Analysis (PSA)

 

 

 

l

l

Open Circuit Potential - Time

l

l

l

l

l

 

 

 

 

 

 

Galvanostat

 

 

 

 

l

RDE control (0-10V output)

 

 

 

 

l

Full version of CV simulator

 

 

 

l

l

Limited version of  CV simulator

l

l

l

 

 

iR Compensation

l

l

l

l

l

External Potential Input

l

l

l

l

l

Auxiliary Signal Measurement Channel

l

l

l

l

l

 

#:  Corresponding polarographic mode can be performed.

&: Corresponding stripping mode can be performed.

*:  Second channel (bipotentiostat mode) can be performed.

 

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