This standard specifies the high-performance liquid chromatography (HPLC) detection method for the anticoagulant rodenticides diphacin, warfarin, fenzofen, bromadiolone, dalon, and fentanyl in biological samples. This standard is applicable to the qualitative and quantitative analysis of dimethonium, warfarin, warfarin, bromadiolone, dalon, and fentanyl in biological samples. It is also applicable to non-biological samples such as suspected poisonous baits.