What cuvette to use for fast vaporizing liquids?

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In summary, the conversation discusses the use of cuvettes for fast vaporizing liquids at room temperature. It is noted that cuvettes with Teflon stoppers are effective, but there is an issue with the seal at higher temperatures. The use of stoppers made of Viton or urethane is suggested as they are resistant to the vapors in the sample. Additionally, the option of using parafilm to seal the cuvette is mentioned.
  • #1
surepic
What type of cuvettes are you using for fast vaporizing liquids at room temperature ?
I found that cuvettes with Teflon stoppers are working so far but the problem is that at room temperature stopper to cuvette wall seal is not enough to hold that pressure so above 15degrees C vapours are finding their way out. I can't use stoppers with holes because of vapours (concentration in the sample is dropping).

Sample is aviation kerosene.
 
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  • #2
Consider "Viton" or a urethane for a stopper material. Viton is used in carburetor float valves because it is impervious to both gasoline and alcohol. I mentioned urethane because it is 'grippyer'. Here is a link for chemical resistance of various polymers.
http://www.mossrubber.com/pdfs/Chem_Res.pdf
 
  • #3
How long does the stuff in the cuvette have to last? Can you just wrap the top in parafilm and be done with it?
 

Related to What cuvette to use for fast vaporizing liquids?

What is a cuvette?

A cuvette is a small, transparent container used in spectroscopy experiments to hold liquid samples. It is typically made of glass or plastic and has a rectangular or cylindrical shape.

Why is it important to use the right cuvette for fast vaporizing liquids?

Using the right cuvette is important because it can affect the accuracy and speed of your experiment. A cuvette that is not suitable for fast vaporizing liquids may cause errors in the measurement of absorbance or transmittance, which can lead to inaccurate results.

What factors should be considered when choosing a cuvette for fast vaporizing liquids?

The most important factors to consider are the material of the cuvette, the path length, and the volume. For fast vaporizing liquids, a quartz or fluoropolymer cuvette is recommended as they have high resistance to heat and chemicals. The path length should also be short to minimize the time for vaporization, and the volume should be appropriate for the amount of liquid being used.

Can any cuvette be used for fast vaporizing liquids?

No, not all cuvettes are suitable for fast vaporizing liquids. Cuvettes made of materials with low heat resistance, such as polystyrene or PMMA, should be avoided as they may melt or deform under high temperatures. Additionally, cuvettes with longer path lengths may take longer to vaporize the liquid sample, resulting in slower experiment times.

Are there any alternatives to using a cuvette for fast vaporizing liquids?

Yes, there are alternatives such as using a microfluidic chip or a specially designed quartz tube. These options are designed for fast vaporization and may provide more accurate results compared to using a traditional cuvette. However, they may also require specialized equipment and techniques, so it is important to consult with an expert before using these alternatives.

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