An inexpensive replacement for dry ice in the laboratory

Area of Science:

• Laboratory Science
• Materials Science

Background:

• Dry ice (solid carbon dioxide) is a common laboratory coolant.
• Dry ice requires specialized handling and storage.
• Limitations exist for dry ice in certain laboratory applications.

Purpose of the Study:

• To present a cost-effective and reusable alternative to dry ice for laboratory sample freezing.
• To evaluate the freezing efficiency of the proposed alternative compared to dry ice.

Main Methods:

• Utilizing commercially available small pellets of stone or metal.
• Storing these pellets in a -80 °C freezer.
• Employing the chilled pellets for rapid freezing of small laboratory samples.

Main Results:

• The developed method provides a faster freezing rate than traditional dry ice.
• The stone or metal pellets are reusable after being returned to the freezer.
• The alternative is inexpensive and readily available.

Conclusions:

• Stone or metal pellets stored at -80 °C offer a practical, efficient, and reusable replacement for dry ice in laboratory settings.
• This method enhances laboratory sample preparation by providing a superior freezing rate.
• The approach presents a sustainable and economical solution for common laboratory cooling needs.