Measurement of Formaldehyde in Formaldehyde and Cresol Solution by Spectrophotometry

Objective To set up a method for detecting formaldehyde in formaldehyde and cresol solution. Methods Based on a yellow-purple complex with a specific absorption wavelength at 413 nm yielded by reacting with NH+4 and acetylacetone,the formaldehyde in formaldehyde and cresol solution was measured by spectrophotometry. Results There was a good linearization between the absorbency from UV and formaldehyde within 4.39～30.73 μg,R2=0.999 9.The average recovery was 99.4% and RSD 1.4%. Conclusion The method is accurate,simple,rapid,specific and can be used to measure formaldehyde in formaldehyde and cresol solution.