Using the national standard method-folin spectrophotometry, this paper makes detailed analysis of the concentration and the changing law of formaldehyde existing in the 50 more houses in Chengdu.
本文采用国家标准方法——酚试剂分光光度法对成都50多处房屋室内的甲醛浓度及其变化规律作了具体的分析，结果显示，总样品甲醛平均浓度为0。
Methods The Folin-phenol reagent method was used.
方法采用福林酚试剂法。
Methods The Folin-phenol reagent method was used.
方法采用福林酚试剂法。
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