摘要
本文研究采用乙酰丙酮分光光度法测定燃香中甲醛的含量,对样品的不同前处理过程进行探讨。实验结果表明,最佳显色条件为80℃水浴5min,比色波长为413nm。当甲醛含量在0.2～20mg/L范围内时,该方法具有很好的线性关系(R=0.99956),最低检出浓度为0.0012mg/L。采用水蒸汽蒸馏法提取样品比用超声法处理样品的回收率高。该方法可用于燃香中甲醛的光度法检测。
A spectrophotometric method was developed for determination of formaldehyde in incense products using acetyle acetone,which could react with formaldehyde to form a yellowish green complex with a maximum absorption at 413 nm. The colorimetric parameters and the preprocessing of samples in the method were studied. Results showed that the optimal conditions were 5 min above 80℃. The method exhibited a linear response toward formaldehyde in the concentration range 0.2～ 20mg/L. The detection limit was 0.0012 mg/L. The recovery of steam distillation was much better than the ultrasonic vibration method.The results indicated that the proposed method could be applied to determinate formaldehyde in incense products.
出处
《福建分析测试》
CAS
2010年第3期32-35,共4页
Fujian Analysis & Testing
关键词
分光光度法
燃香
甲醛
水蒸汽蒸馏法
spectrophotometric method
incense products
formaldehyde
steam distillation
