To provide guidance on standardization of practices for the collection, characterization, and use of soil as a sample matrix or potentially interfering substance in biothreat agent detection applications.

中文翻译：

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附录 P：生物威胁因子检测方法和场地评估的土壤收集、表征和应用指南

为收集、表征和使用土壤作为生物威胁剂检测应用中的样品基质或潜在干扰物质的实践标准化提供指导。