EC Epsilon EClipse, ChronoPotentiometry (CP) gibi bir çok standart tekniğin bulunduğu 40 yılı aşkın süredir elektrokimya alanındaki başarılarıyla bilinen BASi markasının potansiyostat-galvanostat sistemidir. Cyclic Voltametry (CV), Lineer Sweep Voltametry (LSV) gibi tekniklerin yanı sıra yazılım geliştirmesiyle Pulse teknikleri ve sıyırma voltametrileri de ayrıca yazılım ile desteklenmektedir.
Features
- Potentiostat, galvanostat, and potentiometer
- Bi-potentiostat option
- Multiple document Windows interface
- USB connection
- Optically isolated circuitry for noise reduction
- Analog filtering
- Moving average digital smoothing
- Positive feedback iR compensation with circuit stability testing
- Internal dummy cells for hardware test
- Remote control of BASi® cell stands (CGME, C-3 Cell Stand, RDE-2)
- Multiple experimental runs
- File subtraction
- Multiple text data file formats, including DigiSim
- Peak finding routines (auto and manual)
- File overlay
- Anson plot (Q vs. t1/2) for chronocoulometry
- Cottrell plot (i vs. t-1/2) for chronamperometry
- Initiate potentiostat at open circuit potential
- 50/60 Hz selection for noise minimization
- IUPAC or polarographic axis convention
- Wide current range – microelectrode to small-scale electrosynthesis
Specifications
| Potentiostat | Channel 1 applied potential: Dynamic DAC: 16 bit, ±3.275 V @ 0.1 mV resolution or ±10 V @ 0.33 mV resolution Offset DAC: 8 bit, ±2.55 V @ 10 mV resolution Channel 2 applied potential: Dynamic DAC: 8 bit, ±2.55 V @ 10 mV resolution Compliance voltage: ±12 V Maximum current: 100 mA Bandwidth: > 100 kHz Bias current: < 1pA Electrometer input impedance: > 1012 W (values for parameters other than applied potential are for both channels) |
| Current-to-voltage converter | Full scale sensitivity: 1 nA*, 10 nA*, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA,100 mA, (*secondary gain used)
Secondary gain: x1, x10, and x100 |
| Galvanostat | Applied current: 50 pA – 50 mA Range: ±10 V, ± 1 V Measured potential resolution: 0.02 mV Max leakage current: 30 pA |
| I/O | Eout (applied potential) Iout (current to voltage output) Ein (input connection for external applied wave form) Cell Stand port (control of C-3 Cell Stand and CGME) Accessories Port (control of RDE-2) PC (USB) port Trigger out (TTL) |
| Minimum PC requirements: | Windows 2000, XP, Vista, or Win 7 Pentium III 512 MB RAM 10 MB hard drive space available USB port |
| Power requirements: | 120 or 240 VAC, 50/60 Hz, 60 VA |
| Dimensions & weight | 16.75″ (43 cm) x 5.25″ (13 cm) x 12.75″ (32.5 cm) 20.2 lb (9.2 kg) (1 channel) |
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 – 25 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
DC Potential Amperometry
- 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
Chronopotentiometry
- Potential resolution: 20 µV
- Data acquisition up to 20 points/s and high resolution 20-bit data
Electrochemical Techniques – Basic Plus
Sampled Current Polarography
- 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
Square Wave Voltammetry
- 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