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RI-INBRE > Equipment > Jasco J-810 Circular Dichroism (CD) Spectropolarimeter > Standard Operating Procedures

Jasco J-810 Circular Dichroism (CD) Spectropolarimeter

Standard Operating Procedure

General Operation

  • Purge the optical system with nitrogen for 5 min before turning spectropolarimeter on.

  • The nitrogen flow rate is set to 15 liters/min.  Do not adjust the regulator settings.

  • Turning ON the “Power” switch on the instrument front panel does not turn on the light source.  The light source is lit automatically when the measurement program is started.

  • If the instrument is idle during the course of an experiment, keep the light source lit.  Turning the light source ON/OFF frequently shortens its lifetime.

  • If the slit width is set manually, do not widen the slit more than required.  This will slow down the deterioration of the detector.

  • Do not set the HT voltage below 170 volts

  • Shut off the Isotemp water circulator whenever the light source is turned OFF otherwise water will condense on the light source unit, deteriorating its optical components.

Instrument Start-Up

  1. Open the nitrogen cylinder and allow gas to purge the optical system for 5 minutes.
  2. Turn on the spectropolarimeter and the PC
  3. Open the “Spectra Manager” software
  4. Select “Spectrum Measurement” program to initialize the polarimeter and light the lamp (this will take 1-2 min)

Note:  When the light source is lit, the “Lamp” LED of the Amplifier panel (on front of instrument) will be green.

Obtaining CD Spectra

  1. Open the Spectrum Measurement program
  2. Select the “Measurement” menu, then “Parameter”
  3. Place the 10mm cell in the sample holder
  4. Click “Start” from the “Measurement” menu to begin data acquisition
  5. After acquiring the measurement, the Spectra Analysis program opens automatically
  6. Save the spectrum by using the “Save As…” function from the “File” menu

If you want to use the temperature control...

In the Spectrum Measurement program, select “Measurement” →  “Accessory”

Make sure “JASCO Peltier Type (Single, RTE on)” is selected under “Temperature”

To set the desired temperature, click “Control”  →  “Accessory”

Input the temperature and hit “Apply”

To turn the lamp ON/OFF:

In Spectra Manager choose “Instruments”  →  “Start” or “Stop”

News & Events
Important Dates
 

UPCOMING SEMINARS

3/5/09 - Bharat Aggarwal, Ph.D., University of Texas

Title to be announced.

5/14/09 - K. Sandeep Prabhu, Ph.D., Pennsylvania State University State College

Title to be announced.


1/30/09 - RI-INBRE Research Fellows & Faculty Retreat

Baypoint Inn & Conference Center, Roger Williams University


3/06/09 - RI-SURF Application Deadline


 

 Supported by grant #  P20RR016457 from::

 

 

 

 

 

 

 

 

 

 

 

 

 

Contact Info
Contact RI INBRE:  
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