Rudolph Research Analyical - Polarimeter Sample Cells

Rudolph Polarimeter Cells offer significant advantages over traditional fused end all glass cell designs. All glass cells are easily broken, often build up optically active residue on the inside of the glass ends and require the user to change the instrument's aperture whenever the cell is changed.

Rudolph Polarimeter Cells eliminate these problems by using stainless steel ends with built-in apertures which may be removed to allow the glass to be cleaned if necessary. Cells are manufactured using Pyrex glass and stainless steel for their high resistance to solvents, low temperature coefficient of expansion and general dimensional stability.

Screw caps, washers, and end plates are easily removed for cleaning the glass or silica ends, sample cell interiors, or for replacement of the washers and end plates. To reassemble the cell requires following the configuration to the left and then applying finger tight pressure to the screw caps. As the screw caps are turned, the washers are compressed against the end plates creating a leak proof seal with the precision ground cell ends. Minimal screw cap pressure and the compressibility of the washer ensures a tight seal without causing stress induced birefringence in the glass end plates. The screw caps have precision apertures which reduce the beam diameter to less than the internal diameter of the cell so that, when the cells are aligned with the beam, internal sidewall reflections and consequent depolarizing effects are minimized. Flanges on the cells align them coaxially within the 30mm diameter chamber rails which are standard in all Rudolph Polarimeters and saccharimeters.

Easy Filling

Sample solutions are either poured or pipetted into the center well, side well or side tubulation. Air bubbles are released by tilting cells side to side or to one side while filling. Flexible tipped pipettes capable of reaching from the center well to either end of the sample can be helpful in filling narrow bore cells.

AUTOPOLs Accept Sample Cells from 10mm to 200mm Long

Some polarimeters accept only special sample cells, with maximum lengths of 100mm. AUTOPOL Polarimeters and saccharimeters accept cells up to 200mm long. A 200mm sample cell offers twice the sensitivity as the same solution in a 100mm cell. This additional optical path length is especially useful for solutions having small rotations. For precious samples and essential oils with large optical rotations, cells with only 0.02ml volumes and 10mm optical path lengths are available.

Rapid Operation

Rapid Operation is achieved by using a flow through polarimeter sample cell as seen to the right. Once the polarimeter sample cell is filled, each successive sample poured into the funnel will displace the previous sample through the drain tube. This method eliminates opening and closing the sample chamber door and interchanging sample cells. Measurements can be made about as rapidly as successive samples can be poured.

Continuous Sampling Capability

Gasketing in the top of the sample trough allows connection to a process stream. Readings can be downloaded via the RS232 port to a computer at fixed intervals, or when prompted by an operator or computer. Custom cells with special ferrels and fittings are available to allow connection to process streams.

Temperature Control

All Rudolph Research Analytical jacketed cells are available with quick release fittings which allow cells to be easily removed from the sample chamber. Tubing is held in place by rubber gasketing on top of the trough and the door. Temperature control is obtained through the use of an external water bath and a jacketed cell.

The AUTOPOL V Polarimeter uses the TempTrol™ Electronic Heating and Cooling System and TempTrol™ sample cells to eliminate the need for a circulating bath. Simply fill your TempTrol™ sample cell, set the temperature control set point of the AUTOPOL V and press "measure". The TempTrol™ System will heat or cool your sample to the set temperature and make the measurement.

Glass Stopper Cells

For highly evaporative or noxious samples, all Rudolph glass polarimeter cells are available with glass stoppers. Both the stopper and the inside of the glass are ground for an air tight fit.

Micro Volumes

If your application demands 1ml or less, Type 32 Cells offer less than 0.5ml volumes and can be ordered with HPLC fittings transforming your polarimeter into an optical activity detector.

Selection

With over forty-five cells to choose from, Rudolph Research Analytical has a cell to meet every application. Please call our offices for assistance in selecting the best polarimeter sample cell for your application.