What Is The Difference Between The Types Of Cuvettes You Sell For Spectrometers And The Colorimeter?

Inhaltsverzeichnis

Cuvettes are a type of vessel necessary for the precise spectral analysis of liquid samples. Generally used in spectroscopy, cuvettes are designed to hold liquid substances during chemical analysis. These instruments have two or four optical clear windows to ensure you can use light waves to measure the substance of interest without interference from the cuvette itself. They are often used with spectrometers, which measure how much a liquid sample absorbs or transmits a specific wavelength of light.

  • Micro volume cell with fitted PTFE cover, 4 clear windows and clear bottom.
  • Glass, plastic and quartz cuvettes are all suitable for measurements made at longer wavelengths, such as in the visible light range.
  • For fluorimetry – same as type 3 but with tapered PTFE stopper.
  • Besides the in-stock UV quartz cuvettes listed below, we do many custom orders.

Absorbance or transmission determinations shine spectrometer light directly through the cuvette to measure the amount of light absorbed or transmitted through the sample. In this measurement configuration, the opposite-side cuvette walls must be optically "clear" to let light pass unimpeded through the sample. The other two sides of the cuvette are often "frosted" to allow handling of the cell without dirtying the optical surfaces of the other two "measurement" sides of the cuvette. These are known as "two sides clear" or absorbance cuvettes. When youpurchase cuvettes for spectroscopy, you will find a diverse selection of premium-quality options.

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Quartz Flow Cuvette Cell, 0 1mm, 100 Micro Meter,flowing Cuvette

Cleaning can be difficult if the materials being measured stick to the cell walls , or if the determinations are being performed out of the laboratory. They do have two major advantages over disposable cuvettes in that they are resistant to almost all organic solvents and they transmit much further down into the UV. This is especially true for quartz, which is transparent down to the UV cutoff of water at 190 nm, while most glass cells cutoff at around 300 nm in the UV.

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Vwr® Spectrosil Spectrophotometer Cells

If solution is transferred into a cuvette using a Pasteur pipette containing air, bubbles may form inside the cuvette, reducing the purity of a solution and scattering light beams. The solution contained in the cuvette should be high enough to be in the path of the light source. In case the sample needs incubation at a high temperature, care must be taken to avoid temperatures too hot for the cuvette. The new ZS Xplorer software will help you determine the appropriate temperature limits and measurement types based on the specific cell selection as highlighted in red below.

Sample Cup American Beckman 700 Cuvette

Selection of a specific cell type will limit for example the appropriate temperature range, based cuvette size on the selection of the dispersant and cell type. The manufacturing process requires each cuvette and cell to be assembled by direct fusion without the use of adhesives. This ensures resistance to chemical attack and extremes of temperature. Each cuvette and cell displays high transmittance values with performance features extending the spectrum from 190nm nm depending upon the chosen transmission material. CLICK HERE to download the transmission performance curves for UV Quartz, IR Quartz and glass materials.