车间空气中甲醛测定方法较多 ,但目前应用较多的仍为变色酸法和酚试剂比色法。由于酚试剂不易购买 ,所以常用的方法是变色酸比色法 ,此方法灵敏度较高 ,操作方便 ,但不足之处是采集后的样品需当天分析 ,放置时间一旦延长 ,吸光度便急剧下降 ,给工作带来很多不便 ,我们按照稳定 The determination of formaldehyde in the air in the workshop is more, but the more applications are still chromogenic acid and phenol reagent colorimetry. As the phenol reagent is not easy to buy, so the commonly used method is chromotropic acid colorimetric method, this method is more sensitive, easy to operate, but the downside is the collection of samples to be analyzed on the same day, place the time once extended, the absorbance dropped sharply to Work a lot of inconvenience, we follow the stability