The sensitized reaction of non-ionic surfactant to acetylacetone spectrophotometry on the determination of trace formaldehyde in vegetables

In a boilling water bath,formaldehyde could feebly react with acetylacetone.The non-ionic surfactant OP could sensitize the colour reaction.The experimental results showed that the maximum absorption wavelength was 412 nm.The detection limit was 0.1498 μg/mL.The standard deviation and the relative standard deviation for nine blank replicates were 0.0043 and 0.51%.The analysis results to the vegetables with this method were same as the results with the HPLC method,and the RSD was less than 2.5% and recoveries were in the range of 101% to 104%.