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Critical point drying by use of distilled CO2
Acta Histochemica. Supplementband
|January 1, 1986
Summary
This study presents a method to prevent specimen contamination during critical point drying by using gaseous carbon dioxide. This technique effectively removes solid and liquid residues, ensuring sample integrity.
Area of Science:
- Materials Science
- Microscopy Techniques
Background:
- Specimen contamination is a critical issue in critical point drying (CPD).
- Residues from carbon dioxide (CO2) supply cylinders can compromise sample integrity.
- Ensuring high-purity CO2 is essential for accurate microscopy analysis.
Purpose of the Study:
- To develop and validate a method for preventing specimen contamination during CPD.
- To eliminate particulate and liquid residues from CO2 sources.
- To improve the reliability of CPD for sensitive samples.
Main Methods:
- Utilizing the gaseous phase of carbon dioxide from supply cylinders.
- Implementing a water-cooled pipe system for CO2 condensation.
- Controlling CO2 flow to ensure adequate liquid phase delivery to the CPD apparatus.
Main Results:
- Effective removal of solid and non-volatile liquid contaminants from the CO2 supply.
- Prevention of particle and liquid residue transfer to specimens.
- Consistent supply of purified liquid CO2 for the CPD process.
Conclusions:
- The described method successfully prevents specimen contamination during critical point drying.
- This approach enhances the quality and reliability of samples prepared using CPD.
- The technique offers a practical solution for researchers requiring pristine samples.