RE:pH paper vs. meter

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From:Gayle Callis <>
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Tamara is correct, and at the risk of offending someone, I consider this
neither good advice nor good laboratory technic. 

Gayle Callis 

>Date: Wed, 05 Apr 2000 17:27:15 -0400 (EDT)
>From: Tamara Howard <>
>Subject: RE:pH paper vs. meter
>To:, Histology listserver
>    <>
>>Lori Steele from Biogenex just gave a lecture at our State meeting.  She
>>said that a pH meter is not necessary to check the buffer solution for
>>immunohistochemical staining - just use a pH tape with 1.0 intervals.
>>However, it still needs to be done each day you do IHC staining.  I know
>>in our busy lab, it sure is quicker than having to use the meter.
>>Becky Scholes
>>Iowa Pathology Associates
>>Des Moines, Iowa
>Sorry, but this is not a good idea. Try for yourself - round up some pH
>papers - different ranges and vendors - and try all on one buffer. My bet
>would be that you'll get readings all over the place. Quicker may be nice,
>but reproducibility is really worth the extra time - and it takes less
>than 5 mintues to properly calibrate a meter and check your buffer's pH.
>Tamara Howard

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