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苯甲酸又名安息香酸,为白色针状结晶,微溶于水,能溶于乙醇、乙醚等有机溶剂,广泛用作防腐剂,是合成农药的中间体,也是印染、制药工业的原料。由甲苯氧化制苯甲酸,产品含有原料甲苯和中间付产物苯甲酸及苄醇等杂质。目前生产中只用化学滴定法测定苯甲酸的含量。我们利用气相色谱法,对苯甲酸及其杂质进行分离,测定,不仅实现了对苯甲酸的控制分析的目的,且能同时测定甲苯、苯甲醛和苄
Benzoic acid, also known as benzoic acid, is a white needle-like crystal that is sparingly soluble in water and soluble in organic solvents such as ethanol and ether. It is widely used as a preservative and is an intermediate of synthetic pesticides. It is also a raw material for printing and dyeing and pharmaceutical industries. Oxidation of toluene from benzoic acid, the product contains raw materials toluene and intermediate products benzoic acid and benzyl alcohol and other impurities. At present the production of only chemical titration Determination of benzoic acid content. We use gas chromatography, separation and determination of benzoic acid and its impurities, not only to achieve the purpose of the control analysis of benzoic acid, and simultaneous determination of toluene, benzaldehyde and benzyl