By using phenol reagent and FeCl 3 respectively to determinate naphthyl phenol, it showed that naphthyl acetate could be hydrolyzed by DNA. The results corroborated the former conclusion that DNA had esterase like activity. 分别应用酚试剂与FeCl3来检测萘酚,表明DNA能催化乙酸萘酯的水解,印证了以前关于DNA具有酯酶活性的结论.FeCl3法可以作为检测DNA酯酶活性的一种定量方法。