BASi
Bioanalytical System Inc.
BASi is a drug development firm providing contract research services and unique products for the pharmaceutical, biotechnology and medical device industries.
Epsilon Electrochemical Workstation
Electrochemical Techniques - Basic
Cyclic Voltammetry/Linear Sweep Voltammetry
- The most common voltammetric technique for characterizing new redox systems
- Excellent for studying electrochemical and chemical kinetics
- Step height (DAC resolution): 100 µV
- Scan rate: 1 mV/s - 10 V/s
- Optional DigiSim software for digital simulation
- DigiSim text file format
- Measurement of peak potential and current with automatic or manual definition of baseline
Chronoamperometry/Chronocoulometry
- Excellent technique for measuring diffusion coefficients and electrode surface area
- Single or double potential step (equal or unequal step times)
- Step time: 1 ms - 65 s
- Resolution > 20µs
- Digital integration of current for charge vs. time
- Cottrell plot (i vs. t-1/2): slope, intercept, and correlation coefficient, with automatic or manual definition of line
- Anson plot (Q vs. t1/2): slope, intercept, and correlation coefficient, with automatic or manual definition of line
Controlled Potential Electrolysis
- Used to calculate the number of electrons transferred/molecule or the amount of material present
- Data acquisition up to 20 points/s and high resolution 20-bit data
- Automatic termination at user-defined time, minimum current, total charge, or initial/final current ratio
- Basis of most FIA and LC detectors
- Ideal for sensor research and development and amperometric titrations
- Data acquisition up to 20 Hz and high resolution 20-bit data
Open Circuit Potential vs. Time
- Potential resolution: 20 µV
- Data acquisition up to 20 points/s and high resolution 20-bit data
- Potential resolution: 20 µV
- Data acquisition up to 20 points/s and high resolution 20-bit data
Electrochemical Techniques - Basic Plus
- Common technique for quantitative analysis
- Easy to change step height, step width, and current sampling parameters
- Step height: 1 - 40 mV
Normal Pulse Voltammetry/Polarography
- Common technique for quantitative analysis
- Easy to change pulse width, period (drop time), and current sampling parameters
- Pulse width: 3 - 2000 ms
Differential Pulse Voltammetry/Polarography
- Popular technique for quantitative analysis
- Easy to change pulse width, period (drop time), and current sampling parameters
- Pulse width: 3 - 1000 ms
- Measurement of peak potential, current, and area with automatic or manual definition of baselines
- Fastest of the common quantitative analysis techniques
- Excellent detection limits
- User-defined frequency, amplitude, and current sampling parameters
- Square wave frequency: 1 - 2000 Hz
- Measurement of peak potential, current, and area with automatic or manual definition of baselines
Stripping Voltammetric Techniques
- Combination of deposition (preconcentration) step followed by voltammetric (stripping) step
- Linear sweep, differential pulse, and square wave voltammetries available for stripping step
- Technique of choice for determining trace concentrations (10-9 M - 10-11 M) or metal ions, anions, and adsorbates
- Capable of anodic, cathodic, and adsorptive stripping determinations
- Measurement of peak potential, current, and area with automatic or manual definition of baselines
Double Potential Step Chronopotentiometry
- Minimum step time: 1 ms
- Current range: +/- 32 mA
- Resolution: > 20 µs
Electrochemical Techniques - Bi-Potentiostat Option
Multi-Channel Amperometry
- Constant potential amperometry on two channels
- Data acquisition up to 20 Hz and high resolution 20-bit data
Multi-Channel Cyclic Voltammetry
- Scan potential on Channel 1 and hold potential on Channel 2
- Scan both channels over the same potential range at the same scan rate
Multi-Channel Chronoamperometry
- Step Potential on channel 1 and hold potential on channel 2
- Step both channels to the same potentials
- Step time: 1 ms - 65 s
- Resolution: > 50 µs
Methods Option
Sequential Techniques
- String up to 6 techniques together
- Insert trigger and delays in sequence
- Repeat sequence up to 9999 times