AOAC-RI ERP Micro June 2016

OMAMAN-29/OMAMAN-30 Combined Collaborative Study Protocol OMA ERP - June 2016 ERP Use Only

4.5 Discard the LS tube cap – if lysate will be retained for retest, place the caps into a clean container for re-application after lysis. For processing of retained lysate, see

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Appendix A.

4.6 Transfer 20 µL of sample into a LS tube unless otherwise indicated in Protocol Table 5 5. Repeat step 4.2 until each individual sample has been added to a corresponding LS tube 6 in the strip. 2. e.g. Raw dairy products use 10uL.

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9 10 6. Repeat steps 4.1 to 4.6 as needed, for the number of samples to be tested. 11 7. When all samples have been transferred, transfer 20 µL of NC (sterile enrichment medium, 12 e.g., Demi-Fraser Broth) into a LS tube. Do not use water as a NC. 13 8. Verify that the temperature of the 3M Molecular Detection Heat Block Insert is at 100 ±1°C. 14 9. Place the uncovered rack of LS tubes in the 3M Molecular Detection Heat Block Insert and 15 heat for 15 ± 2 minutes. During heating, the LS solution will change from pink (cool) to yellow 16 (hot). 17 Samples that have not been properly heat treated during the assay lysis step may be 18 considered a potential biohazard and should NOT be inserted into the 3M Molecular Detection 19 Instrument. 20 10. Remove the uncovered rack of LS tubes from the heating block and allow to cool in the 3M 21 Molecular Detection Chill Block Insert at least 5 minutes and a maximum of 10 minutes. The 22 3M Molecular Chill Block Insert, used at ambient temperature without the Molecular Detection 23 Chill Block Tray should sit directly on the laboratory bench. When cool, the lysis solution will 24 revert to a pink color. 25 26 11. Remove the rack of LS tubes from the 3M Molecular Detection Chill Block Insert.

AOAC Research Institute Expert Review Panel Use Only

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