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recipes [2010/05/03 21:17]
hagit
recipes [2012/04/04 09:08] (current)
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-CO2 that was isolated from water using dry ice-ethanol traps is collected in a dried break seal. Drying can be done by heating ​it with a flame while pumping on the vacuum line. After sealing and disconnecting the break seal the hot tip is dipped into the liquid N<​sub>​2</​sub>​ dewar to quickly cool it, avoiding exposure of CO<​sub>​2</​sub>​ to high temperature.+CO2 that was isolated from water using dry ice-ethanol traps is collected in a dried break seal. Drying can be done by heating ​break seal with a flame while pumping on the vacuum line. After sealing and disconnecting the break seal the hot tip is dipped into the liquid N<​sub>​2</​sub>​ dewar to quickly cool it, avoiding exposure of CO<​sub>​2</​sub>​ to high temperature. ​After extraction, vacuum line is likely to contain some water and must be dried thoroughly (I do it with a low oxygen flame) before using it again; extraction should therefore be done at the end of the work day. 
 + 
 +CO<​sub>​2</​sub>​ is not likely to be clean enough to measure as is, and should undergo cleaning, just like any other sample. 
  
 ===== Heated gases preparation ===== ===== Heated gases preparation =====
recipes.txt · Last modified: 2012/04/04 09:08 (external edit)