[Histonet] pH strips

[Rande Kline]

I used to be in technical support for a chemical company EMD Chemicals
which manufactures pH test strips.  If I remember correctly, they were
not expiration dated. There are conditions that can cause errors.  I
attached a brochure that states the errors on page 6.  You should keep it
for you records.
http://www.emdchemicals.com/analytics/literature/colorpHast_Products_for_pH_Testing.pdf
Actually, they are pretty accurate.
On Wed, Dec 31, 2008 at 3:11 PM, Rene J Buesa <rjbuesa <@t> yahoo.com> wrote:

> pH strips are made of a "filter paper like" base paper with pH reacting
> reagents for certain pH ranges and, yes, they react improperly after the
> date set by the manufacturer.
> René J.
>
> --- On Wed, 12/31/08, Amber McKenzie <amber.mckenzie <@t> gastrodocs.net>
> wrote:
>
> From: Amber McKenzie <amber.mckenzie <@t> gastrodocs.net>
> Subject: [Histonet] pH strips
> To: histonet <@t> lists.utsouthwestern.edu
> Date: Wednesday, December 31, 2008, 1:43 PM
>
> Do pH strips go bad after a certain time period?
>
>
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-- 
Rande Kline, HT (ASCP)
Histopathology Lab Concepts
P-609-744-0803
F-609-939-0270
randek <@t> histopathconcepts.com