四乙基铅是一种挥发性的、有毒的金属有机化合物,主要用作汽油的抗爆剂。目前测定汽油中四乙基铅的方法有化学法和极谱法。化学法常涉及过滤沉淀及滴定终点不够准等。极谱法要用汞和氮气,操作亦感不便。我们试用铅离子选择性电极作指示电极,以电位滴定法来测定汽油中四乙基铅含量,结果较好,相对误差<±0.3％,滴定完成时间约15分钟。实验证明这是一种快速、 Tetraethyl lead is a volatile, toxic metal organic compound used primarily as an antiknock for gasoline. The current method for the determination of tetraethyl lead in gasoline has chemical and polarographic methods. Chemical methods often involve filtration precipitation and titration end points are not accurate enough. Polarography using mercury and nitrogen, the operation is also inconvenient. We try lead ion selective electrode as the indicator electrode, potentiometric titration method for the determination of tetraethyl lead content in gasoline, the result is better, the relative error of <± 0.3%, titration completion time of about 15 minutes. Experiments show that this is a fast,