毛发毒品分析在吸毒认定中具有独特的优势,但毛发也很容易受到外部毒品的污染,造成分析的假阳性结果。本文论述了毛发的清洗程序与清洗标准和代谢物标准在吸毒认定中的原理和应用,说明了这些标准在消除外部污染的影响及提高毛发分析结果的可靠性方面的有效性和可行性。 Hair drug analysis has unique advantages in the identification of drugs, but hair is also easily contaminated with external drugs and results in false positive results. This paper discusses the principles and applications of hair washing procedures and cleaning standards and metabolites standards in the identification of drug abuse, and illustrates the effectiveness and feasibility of these standards in eliminating the effects of external pollution and improving the reliability of hair analysis results.