目的建立检测奶和奶制品中甲醛的液相色谱方法。方法样品中的甲醛提取后,以0.08mol/L乙酰乙酸乙酯作衍生剂,70℃高温衍生30min,采用二极管阵列检测器检测。结果方法检出限为0.5mg/kg,相对标准偏差小于10.4%;回收率为88.3%～98.1%。结论该方法简便,结果准确可靠,适用于测定牛奶、奶粉等奶制品中甲醛。 Objective To establish a liquid chromatography method for the detection of formaldehyde in milk and dairy products. Methods After extraction of formaldehyde in the sample, 0.08mol / L ethyl acetoacetate was used as a derivatizing agent and derivatized at 70 ℃ for 30min, and then detected by diode array detector. Results The detection limit was 0.5mg / kg, the relative standard deviation was less than 10.4% and the recovery was 88.3% -98.1%. Conclusion The method is simple, the results are accurate and reliable, suitable for determination of formaldehyde in milk, milk powder and other dairy products.