[3dem] Quality of ethane for freezing

[Bullitt Esther]

Hi,

We have always bought technical grade ethane rather than the high purity.  By the bottom of the tank, the grids have contamination, and so we switch it out.

This last time, the tank cost half the price, and has been showing contamination pretty soon after we started using it.  Perhaps it is now a lower grade.

Do people recommend buying the high purity ethane?  My understanding is that it then freezes very rapidly, so one must contend with thawing it often.

thanks,
Esther

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Esther Bullitt, Ph.D.
Dept. of Physiology & Biophysics
Boston University School of Medicine
700 Albany Street, Room W302
Boston, MA  02118-2526

Email:      bullitt at bu.edu
Telephone:  617-638-5037
Facsimile:  617-638-4041
http://www.bumc.bu.edu/phys-biophys/faculty/bullitt