[Histonet] (no subject)

lpwenk <@t> sbcglobal.net lpwenk <@t> sbcglobal.net
Sun Aug 29 06:11:11 CDT 2004

After washing and rinsing, rinse again with d. water.

Use a pH strip to test the pH of the d. water out of the tap. Record that.

Then randomly pull a glassware from the batch you just washed, while it is
still wet. Touch a pH strip to a wet area. It should be the same pH as the
d. water.

Depending on the soap or bleach you are using in the wash water, the pH of
the wash water will be higher or low than the pH of the d. water. So if your
random glassware is the same pH as the d. water, then all the wash water
must have been removed from the glassware

Record the pH of the d. water AND the pH of the glassware. For EACH time you
wash dishes. So batching is better in this case.

Of course, since it is for CAP, write up this procedure in the proper
format, and have it dated and since (and then reviewed after that) by your

Peggy A. Wenk, HTL(ASCP)SLS
William Beaumont Hospital
Royal Oak, MI 48073

----- Original Message -----
From: "john clark" <heytallguy2000 <@t> hotmail.com>
To: <histonet <@t> lists.utsouthwestern.edu>
Sent: Sunday, August 29, 2004 12:19 AM
Subject: [Histonet] (no subject)

One of the CAP questions asks how a lab documents that its glassware is
detergent free.  We hand wash our glassware.  Is it adequate to randomly
select something and pH it to show that the detergent is absent?  Any

John Clark
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Histonet <@t> lists.utsouthwestern.edu

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