OPTIONS

Thermoelectric Cuvette Holder	Thermoelectric Sample Changer	Total Fluorescence Accessory

Thermoelectric Cuvette Holders:
All thermoelectric cuvette holders include compter controlled stirring and nitrogen purge.

Thermoelectric Cuvette Holder:
Single, 1 cm cuvette.

Thermoelectric Sample Changer:
Rotary, 5 cuvettes.

Total Fluorescence Accessory (with Thermoelectric Cuvette Holder):
Collect total fluorescence signal and CD signal simultaneously. Software selectable. Includes single position thermoelectric temperature controlled cuvette holder described above. Right angle access port has light collecting mirror, cutoff filter and 1 inch photomultiplier with power supply added to collect total fluorescence. Cutoff filter easily changed. CD gives information about overall conformation while fluorescence gives information about local environment of fluorophores such as tryptophan at the same temperature.

Fluorescence Detected Circular Dichroism (FDCD):
Measures the difference in fluorescent intensities when exciting with left and right circularly polarized light. Includes total fluorescence measurement capability.

Cylindrical Cell Holder:
For water jacketed 22 mm cylindrical cells. Includes water lines mounted on its own door assembly with quick disconnects.

Automated Syringe Pump System:
For titrations. Includes two 500 µl syringes, 10 mm cell, special titration adapter and stir bar. Highly repeatable programmable syringes for automated ligand titrations and solute induced denaturations. Can be used with single position thermoelectric cuvette holder or total fluorescence accessory. Accommodates the large volume exchanges.

Syringes for pump:
50 µl, 100 µl, 250 µl, 500 µl, 1 ml and 2.5 ml capacity available.

pH Measurement System:
Includes pH meter and micro-probe electrode. Modified cuvette cap and electrode mount for 10 mm cell. Cables are included for complete system integration. pH range: 0 to 14 pH. Requires Automated Syringe Pump System.

Nitrogen Purification System:
Consists of rechargeable gas scrubber and two gas detection and filter assemblies.
(Replacement cartridges available).

Replacement Gas Filter Cartridges:
For nitrogen purification system.

Nitrogen Dewar:
230 liter capacity.

Nitrogen Regulator:
Oil free, 2 stage, nitrogen purge gas pressure regulator and adjustable flow meter. Fits standard gas cylinders and nitrogen dewars.

Holmium Oxide Solution:
For wavelength calibration. NIST Certified.

Spare Xenon Lamp: XBO 150W/4 Suprasil, for 165-1200 nm.

Rectangular Microcell with stoppers:
10 mm path length, 400 µl volume
5 mm path length, 200 µl volume
2 mm path length, 80 µl volume
1 mm path length, 40 µl volume
Spacer for microcell.

Rectangular Cells, Demountable:
0.5 mm path length
0.2 mm path length
0.1 mm path length
0.01 mm path length

Rectangular Cells:
For reduced temperature induced birefringence; includes stoppers.
10 mm path length
5 mm path length
2 mm path length
1 mm path length

Cell Spacers:
For use in Thermoelectric Sample Holder.
1 mm cell spacer
2 mm cell spacer
5 mm cell spacer

For Fluorescence Measurements:
10 x 10 mm, 45 mm high (One included with automated syringe pump).
5 x 5 mm, 21 mm high (Requires spacer. Cannot accommodate stir bar).
3 x 3 mm, 33 mm high (Requires spacer. Cannot accommodate stir bar).
Spacer for 3 x 3 mm path length cuvette.
Spacer for 5 x 5 mm path length cuvette.

Note: All specifications subject to change without notice.