The cuvette holds the sample, and the cuvette goes in the spectrophotometer to perform spectral analysis. However, the world of cuvettes is vast and complex, so it is easy to get lost when trying to decide which cuvette you should use. This article will outline the material requirements and then show a comparison between the different cuvettes in order to help you choose the right cuvette.
If you’re a beginner in fluorometer and spectrophotometer research, it’s easy to get confused about cuvette selection. You can then google “How to choose the right cuvette”. Most answers will tell you that the cuvette material is important because the UV rays cannot penetrate most glass cuvettes, but can pass through quartz cuvettes.
Cuvettes are usually made of plastic, glass, or quartz. Below is a list of cuvettes that are available.
1. What material do you require?
It all depends on the wavelength of the solvent you use to measure the sample.
Wavelength
Cuvettes can be made from a variety of transparent materials such as optical glass or quartz. Every material has its own light-passing characteristics, so it is important that you are aware of these optical characteristics before choosing a cuvette material.
Below are the most popular cuvettes. You can see the materials used and the appropriate wavelength.
1. Optical Glass Cuvettes
This cuvette material can be used in the visible spectrum. It has a good transmission range of 340 to 2,500 nm.
2. UV Quartz Cuvettes
UV-VIS absorbance studies require a UV quartz cuvette. If you try to save money by using a cheaper glass or plastic cell, you will get inaccurate data.
3. IR Quartz Cuvettes
It is a great choice for UV VIS measurement because of its transmission range, which is between 220nm and 3,500nm.
4. Polystyrene or Polymethyl Methacrylate are both available.
The visible spectrum of PS and PMMA quartz covers a transmission range of 380nm to 780nm. This range is sufficient for most applications and does not require additional UV or IR points.
Each material has its own advantages and disadvantages. Depending on the application, which of these materials is best will also determine which one.
Quartz material is the most transparent material in the visible and ultraviolet ranges. It is also the best choice for measuring samples in the UV-light spectrum.
Plastic and glass materials are transparent to visible light (380-780nm), but absorb UV (190-340nm). Plastic and glass cuvettes can be used to colorimetrically measure protein density or colorimetric measurement of bacterial culture density. However, they cannot be used for purity and concentration measurements in the UV ranges.
Cuvettes should have a high transmission for certain wavelengths. However, if you have a limited budget and need to test samples only in visible light, you will want to use a Plastic or Optical Glass cuvette. Plastic cuvettes can be used as disposable and low-cost tools.
Transmission of Different Materials in Empty Cuvettes
Cuvettes are made from different materials and can be assembled using different techniques, like gluing, powder fused or all fused.
If the sample is an inorganic solvent, it will work with all plastic, glass, and quartz cuvettes.
Work Samples
Ideal cuvette materials would be transparent to the light beam of the target and not react with the samples being measured.
When the sample is an inorganic solution, the material of the cuvette is less important than the material it is made from. You can use any of the plastic, glass or quartz cuvettes.
If you are using organic solvents in your sample, it is better to use more durable cuvettes such as the Quartz and Glass cuvettes.
And you should go with chemical resistant fused (CRF) or high-temperature-resistant (HTR) versions rather than the non-resistant to chemicals (NRC) because the NRC cuvette is assembled with glue, benzene, ethanol, corrosive solutions, or other similar attribute solvents may cause the cuvette to leak because it degrades the bonds between the pieces.
2. What kind of cuvette are you looking for? Fluorescence or Spectrophotometer cuvette?
It all depends on which Laboratory Apparatus will be used.
Cuvettes, which are spectrometers, are cells with two parallel sides that are optically transparent. The light beam is directed in a straight line from the front to the back windows of the cuvette.
Our QS20-02 and QS37 are the most popular cuvettes for UV VIS Spectrophotometer measurements. The QS20-02 cuvettes and the QS37 cuvettes are almost identical. Only difference is that QS37 cells are squared while Type 5 cells are rounded.
These cuvettes offer the perfect balance for anyone looking for high-quality UV quartz cuvettes. This cuvette offers the full range of UV quartz material at an affordable price. QS2002 costs $12.3, making it an excellent choice for labs that are on a tight budget.
There are a few basic spectrophotometer quartz cuvettes. The rounded bottom cuvette is generally less expensive than the square bottom cuvette for the same type. You can click here to see more information about spectrophotometer cuvettes.
Fluorescence cuvettes include cuvettes with 4 optically polished walls. Some specialized cuvettes may have 3 transparent walls.
QS22-02 is the most basic fluorescence quartz cells for UV VIS measurements. This cuvette comes with all four windows in clear and is made from UV-grade quartz.
You can find basic fluorometer cells like spectrometer cuvettes. A round bottom is another option in our fluorescence line.
3. How long do you require for your path?
The maximum path length that you can use will depend on your laboratory apparatus. Other factors such as sample characteristics, volume availability, concentration levels, and types and types of measurements made will also affect your decision to choose the right path length for your cuvette.
The light path, or length, of a standard spectrometer cuvette is the distance between its interior walls where light passes through. This refers to the distance between the back window cells and the front windows. There are many lengths of cuvettes. Cuvettes are most commonly 10 mm in length.
We offer paths lengths from 1mm to 100mm, in addition to the standard 10mm cuvette path. Light paths smaller than 1mm are also available, but these are for more specialized cells like demountable cuvettes and HPLC (High-performance liquid chromatography flow cuvettes).
