甲醛的定量过去广泛采用变色酸法和乙酰丙酮法。这两种方法虽各具优点,但也存在着某些不足。变色酸法的缺点是使用浓硫酸,且要在沸水浴上加热;乙酰丙酮法不仅要加热,而且所呈现的黄色缺乏特异性。作者对AHMT法、变色酸法和乙酰丙酮法的灵敏度、共存物质的干扰等进行了比较,AHMT法的灵敏度为其它两法的2倍,在常温条件 Quantification of formaldehyde in the past widely used chromotropic acid and acetylacetone method. Although these two methods have their own advantages, but there are also some shortcomings. Discoloration of the acid method is the use of concentrated sulfuric acid, and to be heated in a boiling water bath; acetylacetone method not only to heat, but also the lack of specificity of the yellow. The authors compared the sensitivity of the AHMT method, the chromogenic acid method and the acetylacetone method, the interference of coexisting substances, etc. The sensitivity of the AHMT method was twice that of the other two methods, and at room temperature