How can I determine the amount of Tc99m I will get from a radionculide
generator (wet) before eluting it?

Hello again - good to see you back

There are variables involved here and without those variables being
part of the question, the answer is of necessity short if I am reading
your question right.  The variables being the time elapsed since the
last elution.

Elutions may be generated any time.  But the amount of Tc99m available
will depend on the time since the last elution.  Approximately 47% of
maximum Tc99m is reached after 6 hours and 95% after 24 hours.

The website used has full charts regarding halflife and generation
times which will fill in the time factors and enable you to determine
the amounts of Tc99m you will have available.  If I try to copy them
here, they will probably fly apart all over the place when I post
them.

If I am on the wrong track as to what you are asking about, please let
me know before you rate the answer.

information above from:
http://www.radiopharm.com/pdf/pi/Technelite.pdf - A PDF file, Acrobat
reader Needed - the website is from Bristol-Myers Squibb

Search - google

Terms - Tc99m generation

Cheers
digs

just what i was looking for, thanks