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November 2018

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Date:
Mon, 26 Nov 2018 23:15:30 +0000
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The Pharmaceutical Microbiology Forum Email List <[log in to unmask]>
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"Knutsen, Chris" <[log in to unmask]>
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I am of the opinion that it is not a good practice, unless you are sampling an area with very high particle counts.  Particulates may not be uniformly distributed and, as a result sampling a lesser volume or a greater volume than 1 cubic meter may give discrepant values.


Chris Knutsen, Ph.D.
Technical Fellow
ASO Microbiology Science and Technology
Bristol-Myers Squibb Company
1 Squibb Drive
New Brunswick, NJ 08902
Tel : +1-732-227-5375
Fax: +1-732-227-3071
Cell: +1-609-751-8362
e-mail: [log in to unmask]

-----Original Message-----
From: The Pharmaceutical Microbiology Forum Email List <[log in to unmask]> On Behalf Of Tony Cundell
Sent: Monday, November 26, 2018 11:48 AM
To: [log in to unmask]
Subject: Re: [PMFLIST] Reporting particulate matter in classified areas

Using a conversion factor is problematic as the specification is set on the basis of the volume of sample collected.

On Mon, Nov 26, 2018 at 11:07 AM Adnan Zahid (Head of Quality Control) < [log in to unmask]> wrote:

> Dear All,
> Could anybody make it clear that is this possible to convert the
> results of non-viable particulate matter in classified areas into m3
> if sampling was done with different volume e.g. ft3. In latest ISO
> 14644-1 (2015) they have put examples where 1 ft3 volume was taken
> however reported as m3 after multiplying it with 35.3.
>
>
> Adnan
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--
Tony Cundell, Ph. D.
Consulting Microbiologist
Email: [log in to unmask]
Phone: 914 725-3947
Cell: 914 841-0074

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