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3M Petrifilm SALX Collaborative Study
July 2013
OMA-2013-July-XXX
DRAFT DOCUMENT
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but must be separated from the main report. Results and comments should be returned to the Study
1
Director immediately upon completion of each portion of the study.
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Information about this Collaborative Study
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Shipment Schedule
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Test portions will be shipped by overnight express courier to arrive the day before initiation of analysis.
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If the test portions do not arrive by the normal delivery time one day prior to analysis, please contact a
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co-Study Director. All test portions will be shipped refrigerated.
Analysis of test portions must be
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initiated on the day scheduled by the Study Director. Test kits will be sent directly from 3M.
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Proposed analysis schedule
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Food
Date Shipped
Date Tested
Raw ground beef
(80/20)
25g-SALX
25g-MLG
Thursday
Monday
Dry dog food
375g-SALX
25g-BAM
Thursday
Monday
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Test Portion Receipt
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Note condition of package on the data sheets and notify the Study Director if any packages appear to
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have been compromised or if the food product does not arrive in the appropriate condition. All
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refrigerated products should arrive cold to the touch and should be stored at 4
°
C (refrigerated) until the
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day of analysis. Dry products should be stored at room temperature until the day of analysis.
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Test Portion Analysis
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Collaborators will be provided with enough test portion to test each matrix using the 3M Petrifilm SALX
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method and the appropriate reference method. For the week of raw ground beef testing, collaborators
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will receive two sets of test portions: 36 x 25g (3M) and 36 x 25g (MLG). For the week of dry dog food
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testing, collaborators will receive: 36 x 375g (3M) and 36 x 25g (BAM). See Appendices 8.5-8.6 for
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detailed instructions on analysis. Please review the reference methods carefully before initiating
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analysis.
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One additional 60 g control (negative) test portion will be provided to each collaborator for each matrix
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to determine the total plate count on the day of analysis. One temperature control sample will also be
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included in the shipment to document the temperature of the sample upon receipt. Record all results on
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the data sheet provided.
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OMAMAN-08/Collaborative Study Protocol
March 2014
Expert Review Panel Use Only
AOAC Research Institute
Expert Review Panel Use Only