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Subject:
From:
"Sattelberg, Nicholas" <[log in to unmask]>
Reply To:
The Pharmaceutical Microbiology Forum Email List <[log in to unmask]>
Date:
Wed, 28 Nov 2018 20:13:41 +0000
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Thanks Tim, I will check those out. I like that the color scale starts at 0 as opposed to the ones we are using. 

Nick Sattelberg
Lead Scientist, Microbiology
   

-----Original Message-----
From: The Pharmaceutical Microbiology Forum Email List <[log in to unmask]> On Behalf Of Timothy Cser
Sent: Wednesday, November 28, 2018 1:54 PM
To: [log in to unmask]
Subject: Re: [PMFLIST] VHP concentration testing in liquid

CAUTION:  This email originated from outside the organization.
Do not click or open attachments unless you recognize the sender.


Hi Nick.  We do carry those types of strips as well and they are "semi-quantitative" as it is a visible read.  The color of the reagent you're testing may or may not matter, depending on whether it will penetrate the pad.  There is always the possibility of dilution as well.  You could always run some controls to see if the reagent interferes with the reading.

https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.emdmillipore.com%2FUS%2Fen%2Fproduct%2FPeroxide-Test%2CMDA_CHEM-110011%23documentation&amp;data=02%7C01%7CNicholas.sattelberg%40CATALENT.COM%7C751b2f4c11af4b97bdf408d6556980a6%7Cc2bc6cae7bbb4cda9ebc2076949bbc8d%7C0%7C0%7C636790308991193866&amp;sdata=UlLzso%2FTZI3CV98xTfQrKamnmuQY0ixNg%2F6rkG%2F38wE%3D&amp;reserved=0

Tim Cser
[log in to unmask]

MilliporeSigma

MilliporeSigma is a division of Merck KGaA, Darmstadt, Germany

-----Original Message-----
From: The Pharmaceutical Microbiology Forum Email List <[log in to unmask]> On Behalf Of Sattelberg, Nicholas
Sent: Wednesday, November 28, 2018 5:39 AM
To: [log in to unmask]
Subject: [PMFLIST] VHP concentration testing in liquid

Hello,

I was curious what others are using to test VHP concentration in liquids when performing VHP penetration testing. We are currently using test strips from Water Works, though I am not sure how accurate these are. I could also foresee issues with dark colored liquids as well since you are using a color change scale similar to pH test strips.

Thank you,

Nick Sattelberg
Lead Scientist, Microbiology



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