表面活性剂增敏乙酰丙酮光度法测定蔬菜中的痕量甲醛  

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

作　　者：郭振良[1] 任淑华[1] 

机构地区：[1]鲁东大学化学与材料科学学院,烟台264025

出　　处：《分析试验室》2013年第5期88-90,共3页Chinese Journal of Analysis Laboratory

摘　　要：在沸水浴中,痕量甲醛与乙酰丙酮能发生微弱的显色反应。实验发现,非离子表面活性剂OP对上述反应有较强的增敏作用,由此建立了一种测定痕量甲醛的新方法。溶液的最大吸收波长在412 nm,检出限为0.1498μg/mL,9次空白实验的标准偏差为0.0043,相对标准偏差为0.51%,方法用于测定大白菜中的甲醛时,测得结果与非增敏乙酰丙酮光度法及HPLC法的结果一致,所得结果的RSD均小于2.5%,回收率为101%～104%。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. 1498μg/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%.

关 键 词：表面活性剂OP 甲醛 乙酰丙酮分光光度法 增敏 

分 类 号：O657.3[理学—分析化学]