【摘要】 光度法测定甲醛,灵敏度高、选择性好、成本较低,但对化妆品样品的前处理时间较长。目前用光度法快速测定化妆品中甲醛的方法尚未见报道。用乙酰丙酮作显色剂,提高反应速率,以50%异丙醇作测定溶液,即能解决样品前处理时间长的缺陷。甲醛的方法检测限为0.78mg/L。回收率范围95%~97%,RSD为0.5186%~2.0032%。方法精密度高,准确度好,测定速度快,可用于商业化妆品中甲醛的快速测定。与标准检测方法进行比对,结果满意(Z=0.35)。更多还原

【Abstract】 Determination of formaldehyde by spectrophotometer is a method with high sensitivity,good selectivity and low cost,but the pre-treatment of samples for cosmetics is longer.Rapid Determination of formaldehyde in cosmetics by this method has not been reported so far.The method here is as follows: using acetyl acetone reagent to accelerate the reaction rate,50% isopropyl alcohol solution was used as detection solution,which can solve the longer sample preparation times problem.The detection limit for formaldehyde was 0.78 mg/L,recoveries were 95% ~ 97%,RSD was between 0.5186% ~ 2.0032%.The method is high precision,good accuracy,quick and can be used for commercial rapid determination of formaldehyde in cosmetics.The method and the standard detection methods were compared,the satisfactory results(Z = 0.35) were obtained.更多还原