10% NBF. How to check the concentration.

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From:"Mohammed, Sayeed" <Sayeed@www.urol.bcm.tmc.edu>

Hi Histonetters.
Recently a neighboring lab had a problem with two different batches of
formalin from the supplier. One batch was not fixing the tissue( routine
tissue ) properly, whereas the other batch fixed it in the same time and
same type of tissue. The supplier did not have any answers except " we
checked the batch and found nothing wrong with it." The techs in the lab
checked both batches for pH and found no difference. So, my suggestion was
to check the concentration. Any netters out there have an idea. 

*	M. Sayeed
Email: sayeed@www.urol.bcm.tmc.edu

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