Detecting bromethalin in rodenticide pellets

I work in the forensic industry, so I have no experience with extracting pesticides from food products.  I am looking for an extraction method to identify bromethalin in rodenticide pellets.  I received a method that uses QuEChERS dSPE column and a Bond-Elut polish tube but I've never used either of these before.  Does anyone have experience with this?

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