Abstract: In this paper, the content of free formaldehyde in large core board was successfully determined by perforated extraction and acetyl acetone spectrophotometry. In the environment of constant temperature shaking water bath and acetic acid-ammonium acetate buffer solution (pH = 6), formaldehyde reacts with acetyl acetone to produce a stable yellow compound 3-methylene-2, 4-pentanedione, which is then measured at a wavelength of 412 nm Its absorbance. The results show that when using perforated extraction and acetyl acetone spectrophotome...
