Spectrophotometer Cuvettes and Cells
The concept of absorption spectrophotometry is that each chemical substance has unique characteristics that influence what wavelengths of energy it will absorb. The electromagnetic spectrum’s ultraviolet, visible, and infrared portions are used to conduct most tests. The resonant frequencies at which energy is absorbed are varied for each molecular arrangement of atoms. When the energy of various wavelengths created by a spectrophotometer is focused into a chemical sample, it is transmitted selectively. Absorption is the term for this type of energy transmission.
The human eye is only sensitive to wavelengths in the spectrum ranging from 390 nanometers (violet) to 770 nanometers (red). However, absorption happens in the UV and IR spectrums as well. Optical windows of VIS, UV, or IR grade are available on Qvarz brand cells, providing good results at those wavelengths. The specs of these different window material options may be found in the accompanying charts and tables.
Spectrophotometer Cuvettes and Cells – Full List
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Rectangular cells are by far the most popular type of analytical chemistry cell. Our rectangular cells will fit the cell holder provided with nearly any brand of instrument since Qvarz.com supplies all of our cells to precise tolerances.
Qvarz.com has conventional light path diameters ranging from 0.1 mm to 100 mm, with the 10 mm light path (3.5 ml capacity) being the most popular (see chart) The typical cell window is 1.25 mm thick, and we provide rectangular cells with VIS, UV, and IR optical windows. (Use above chart to sort the cells.)
A PTFE cover is included with most rectangular cells. Stopper tops are available in most sizes for improved closing. Qvarz.com, on the other hand, features a threaded top and PTFE cap – either sealed or septa – for the utmost in positive closure. In comparison to other cell makers, our threaded tops offer the largest inner aperture for simple cleaning. A graded seal, 6 mm x 8 mm tube, and optical coatings on windows are all available as options for our rectangular cells.
When a high volume is desired or cell volume is not a problem, cylindrical cells are most commonly provided. Because certain instruments have a big circular beam, cylindrical cells are occasionally necessary. All of our cylindrical cells are built to the same exacting standards as our other cells. For VIS, UV, and IR applications, Qvarz.com offers cylindrical cells with light pathways ranging from 0.01 to 100 mm with window options. Stopper tops or threaded tops are available as closure options (solid or septum type caps).
IR Cuvettes
New products with updated stocks.
All Qvarz.com brand cuvettes and cells are designed to meet industry size and quality criteria. Borosilicate and quartz cells are extremely precise optical components that go through a number of manufacturing processes, inspections, and procedures to ensure that they meet industry requirements. All of Qvarz.com standards are calibrated on a regular basis, and all calibrations are traceable to NBS master standards.
You can’t go wrong with such a wide range of kind, size, and material options. Most conventional spectrophotometers will accommodate all of our cuvettes and cells. Adapters are available to handle smaller path length cells in the conventional 10 mm spectrophotometer.
Cuvette caps and closures create a secure, dependable seal on cuvettes for storage while also protecting the top edge of the cuvette from damage or scratches. They’re usually constructed of PTFE and come in sizes that suit most standard-sized cuvettes. They can also be autoclaved.
A Teflon PTFE cover is included with every standard open top cells at no additional cost. Volatiles are contained by PTFE Lids, although they are the least dependable closure. In terms of containing volatiles, stopper tops outperform lids. They are not totally trustworthy, however, because the stopper can become dislodged if the cell is tipped over. Stoppers should never be pushed too far into the ground taper since the glass or quartz may shatter. Similarly, never overfill a stopper top cell to the point where the stopper comes into touch with the liquid: enormous pressures can be created in this way, causing any cell to rupture. Finally, do not leave samples stoppered in the cell for an extended length of time, since the stopper may become “frozen” and difficult to remove. Teflon is used to make our stoppers.
Open Top Cuvettes
New products with updated stocks.
Stopper Cuvettes
New products with updated stocks.
By far the most effective closure available is threaded tops. In terms of volatiles, almost full protection is offered. The threaded top cell was the first introduced to market it in 1984, and currently sells it in a number of configurations. The internal diameter of our threaded caps is approximately 8 mm, enabling simple access to the interior for cleaning. Injectable septa caps allow the user to inject chemicals directly into the cell, reducing the risk of contamination of the sample or the environment due to exposure, spillage, or contamination.
Screw Threaded Cuvettes
New products with updated stocks.
Our Features
- Standard Sizes in the Industry
- Custom Capabilities Fully Molded/Fused/Bonded Cells
- Threaded Caps of Superior Quality
- Deal directly with the manufacturer—no salespeople involved.