过氧化氢氧化酸碱滴定法测定苯甲醛的含量

Determination of Benzaldehyde Content by Hydrogen Peroxide Oxidizing Acid-Base Titration

本文提出和建立了一种分析醛类化合物的方法,并用此方法测定了分析纯苯甲醛的含量为99.4%,相对标准偏差为0.21%.实验表明苯甲醛中所带的杂质苯甲醇以及乙醇,甲醇均不干扰测定,苯甲酸的干扰可以扣除.本法操作简单,终点易于掌握,推广应用方便.

An analytical method of aldehyde compounds, hydrogen peroxide oxidizing acid-base titration, was established. Benzaldehyde content of 99. 4% (analysis purity) is determined, and its relative standard deviation is 0. 21%. The determination is not disturbed by impurities such as benzyl alcohol, ethanol and methanol, and the disturbance of benzoic acid may be eliminated. This method has many distinguishing features, such as easy to be operated, easy to grasp the terminal point and can be easily applied widely.