摘要
用过量无机酸酸化苯甲酸钠水溶液,经结晶干燥可制备苯甲酸产品,针对标准HG 3-987—76中苯甲酸纯度测定法测定苯甲酸产品纯度时,残余无机酸会导致测定结果偏高的问题,通过实验建立了一种采用中和、调pH值后,再进行酸滴定的新的苯甲酸纯度分析测试方法——中和酸滴定法,方法操作简便,测定结果准确。
The purity measurement result of benzoic acid determined by alkali titration according to HG 3-987-76 is higher than the real purity because of the inorganic acid that remains, when the benzoic acid is produced from soclium benzoate with excessive acid. A new method of acid titration adopting neutralization and adjusting pH is proposed to measure the purity of benzoic acid. The operation is easy and the result is accurate.
出处
《河北工业科技》
CAS
2007年第2期105-107,共3页
Hebei Journal of Industrial Science and Technology
基金
河北科技大学校立基金资助项目(XL2005016)
关键词
苯甲酸
纯度
测定
中和
滴定
benzoic acid
purity
measurement
neutralization
titration
