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Limits for ATP swabs


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#1 Rener De Jesus

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Posted 17 February 2017 - 10:03 AM

Hi guys! We are using ATP swabs to check the efficiency of our cleaning and sanitation procedures. However, I do not know exactly what are the limits wheb to accept or reject the sample. Thank you guys for sharing your thoughts.

-Renz


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#2 Tony-C

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Posted 17 February 2017 - 10:41 AM

Hi Renz,

 

Different systems and surfaces produce different readings. It might help if you indicate the system you are using.

 

With ATP swabs you will need to establish acceptable levels (validate) yourself by monitoring cleaning by inspection and taking duplicate micro swabs when you take the ATP swabs.

 

Kind regards,

 

Tony


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#3 TatyanaT

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Posted 17 February 2017 - 02:26 PM

Hi Renz!

Maybe this study will help you

Attached Files


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#4 raa89

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Posted 18 February 2017 - 04:44 PM

Limits depends ontype of surfaces, type of production, type of material (stainless, plastic). Also luminometers have different sensivity.  

 

Standard limit - 300, but You should take a ATP swab and (to comparison) swab to check microbiology (i. e. total bacterial count, yeast, listeria).

So you can determine your own limits for your production. 


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#5 Rener De Jesus

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Posted 18 February 2017 - 06:02 PM

That is what I am thinking also. I've read several product descriptions of different ATP swabs.

Thanks for sharing your thoughts.


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#6 Charles.C

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Posted 19 February 2017 - 01:21 AM

Hi Rener de Jesus,

 

Yr unit brand is unknown but the following comments are more or less concptually  "standard".

 

Initially you need to set up a baseline (aka threshold) level.

 

See the first attachment (manufacturer's manual) in this post which has a nicely explained generic Procedure  -

 

http://www.ifsqn.com...ter/#entry66395

(Pg 16 et seq)

 

In addition to above linked thread, can also see  these discussions (there are many others) on ATP "limits" -

 

http://www.ifsqn.com...its/#entry61440

http://www.ifsqn.com...d-swab-testing/

 

PS - similar to the file in Post 3 but perhaps a slightly easier read, a table comparing units/limits/sensitivities from different manufacturer's has been previously posted on this forum. In agreement, i think, with Post 3, there are some differences.


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#7 Tony-C

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Posted 19 February 2017 - 04:37 AM

Hi Rener de Jesus,

 

Yr unit brand is unknown but the following comments are more or less concptually  "standard".

 

Initially you need to set up a baseline (aka threshold) level.

 

See the first attachment (manufacturer's manual) in this post which has a nicely explained generic Procedure  -

 

http://www.ifsqn.com...ter/#entry66395

(Pg 16 et seq)

 

In addition to above linked thread, can also see  these discussions (there are many others) on ATP "limits" -

 

http://www.ifsqn.com...its/#entry61440

http://www.ifsqn.com...d-swab-testing/

 

PS - similar to the file in Post 3 but perhaps a slightly easier read, a table comparing units/limits/sensitivities from different manufacturer's has been previously posted on this forum. In agreement, i think, with Post 3, there are some differences.

 

Thank you Charles, a lot of useful information there and also highlighting the fact you need to establish limits yourself given there is even variation between swabs and machines supplied by the same manufacturer.

 

Kind regards,

 

Tony


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#8 StacySmith7765

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Posted 21 February 2017 - 07:20 PM

Charm Sciences Inc:

 

Surface Type       RLU Limit

Stainless Steel        1000

Teflon                      2500

Plastic                     2500

Aluminum                8000

Rubber                    4500

 

** "In order to establish common standards, listed above are recommended initial pass/fail limits based upon Charm Sciences' experience within many food processing environments.  These limits can be reduced over time as plants are able to achieve passing results.  Corporate initiatives can also dictate tighter limit specifications by product risk, wet/dry cleaning, positive microbiological results, or product on hold.  A swab monitoring program must be flexible to meet the customer's needs, as one size does not fit all in the processing world.  The NovaLUM can easily accommodate the different sanitation monitoring requirements of all of its users."


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#9 Charles.C

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Posted 21 February 2017 - 07:44 PM

Charm Sciences Inc:

 

Surface Type       RLU Limit

Stainless Steel        1000

Teflon                      2500

Plastic                     2500

Aluminum                8000

Rubber                    4500

 

** "In order to establish common standards, listed above are recommended initial pass/fail limits based upon Charm Sciences' experience within many food processing environments.  These limits can be reduced over time as plants are able to achieve passing results.  Corporate initiatives can also dictate tighter limit specifications by product risk, wet/dry cleaning, positive microbiological results, or product on hold.  A swab monitoring program must be flexible to meet the customer's needs, as one size does not fit all in the processing world.  The NovaLUM can easily accommodate the different sanitation monitoring requirements of all of its users."

 

Hi Stacy,

 

Thks for the input but respectfully, from a general practical POV, i totally disagree.

 

You need a baseline for your own unit.


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#10 Tony-C

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Posted Yesterday, 06:05 AM

Charm Sciences Inc:

 

Surface Type       RLU Limit

Stainless Steel        1000

Teflon                      2500

Plastic                     2500

Aluminum                8000

Rubber                    4500

 

** "In order to establish common standards, listed above are recommended initial pass/fail limits based upon Charm Sciences' experience within many food processing environments.  These limits can be reduced over time as plants are able to achieve passing results.  Corporate initiatives can also dictate tighter limit specifications by product risk, wet/dry cleaning, positive microbiological results, or product on hold.  A swab monitoring program must be flexible to meet the customer's needs, as one size does not fit all in the processing world.  The NovaLUM can easily accommodate the different sanitation monitoring requirements of all of its users."

 

 

:welcome: Stacy

 

Hi Stacy,

 

Thks for the input but respectfully, from a general practical POV, i totally disagree.

 

You need a baseline for your own unit.

 

In addition to your comments Charles, it would appear that the recommended initial pass/fail limits are extremely high :potplant: 

 

If you look at the procedural flow chart from Charm:

 

Attached File  MRK-1056.pdf   1.01MB   3 downloads

 

You will see that the example shows a 100cm2 swab of a stainless steel surface producing a result of 0. If that is an actual result then a limit of 1000 would be ridiculous. Another point to make, food contact surfaces vary in size and it not always as simple as swabbing a 10cm x 10cm area. This is part of establishing your own limits.

 

Kind regards,

 

Tony


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#11 GMO

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Posted Yesterday, 12:54 PM

Is it only me that finds ATP swabbing a monumental waste of time?  (Just throwing this out there!)  :sofa1:

 

If they were as good as is claimed by the manufacturers auditors would use them.  They never do in my experience.


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#12 Tony-C

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Posted Yesterday, 05:09 PM

Is it only me that finds ATP swabbing a monumental waste of time?  (Just throwing this out there!)  :sofa1:

 

If they were as good as is claimed by the manufacturers auditors would use them.  They never do in my experience.

 

Hi GMO,

 

I'm pretty sure we've had this discussion on the forums before!

 

I pioneered the use of ATP technology in the UK dairy industry in the 90's. It achieved phenomenal results including a 99% reduction in coliform failures and provided significant assistance with fresh milk, moving a product which had a 6/7 day shelf life to a product with a 10/11 day shelf life (there have been subsequent developments to increase this shelf life).

 

Kind regards,

 

Tony


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