- Sodium chloride and crushed ice. * ~ 1 part salt + 3 parts crushed iced. Good for cooling down to -21C.
- Potassium chloride and water. * ~ 1 part salt + 4 parts water. Good for cooling down to -11C.
- Calcium chloride (CaCl2*6H20) and water. * ~ 2 parts salt + 1.4 parts crushed ice. Good for cooling down to ~ -55C.
The HPLC "Hints and Tips" found here will be of interest to anyone performing HPLC, UHPLC (UPLC), LC/MS, SFC, CE or GC analysis. Many of these free tips, taken from professional classes that I teach, discuss fundamental to advanced level chromatography concepts in a practical way. Occasionally, I will also include laboratory computer related tips here too. Please "follow" this blog to receive updates of new posts. Hint: Type keywords into the SEARCH bar to quickly find other articles.
Saturday, August 11, 2018
Cooling Solutions & Mixtures
An alternative to using an ice bath, peltier cooler or recirculating chiller to cool a solution is to prepare a solution whose freezing point is far below that of water. Here are a few salt mixtures which may be used in the laboratory as "cooling - bath" solutions.
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