四乙酸铅电位滴定法测定汽油中的硫醚硫

DETERMINATION OF SULFIDES IN GASOLINE BY LEAD TETRAACETATE

关键词:  四乙酸铅 电位滴定法 测定 汽油 硫醚硫 炼油厂

Key words:  sulfide, gasoline, potentiometric titration, lead tetraacetate, nonaqucous titration

摘要:

与传统的紫外光谱法相比，应用四乙酸铅电位滴定法测定汽油中硫醚硫的含量，具有化学计量点处电位突跃明显、电位值稳定、操作简单、结果准确可靠的特点。实验表明，汽油中除硫醇硫及二硫化物对测定结果有影响外，其中的烯烃则对测定结果无影响。采用该法测定胜华炼油厂FCC汽油中硫醚硫的含量为0．140％(ω)，该法标准偏差小于0．01％，相对标准偏差小于2．86％。

Abstract:

Comparing with conventional method of violet spectrum, the method of potentiometric titration of lead tetraacetate has many advantages such as stable potentiometric value, exact and credible results, clear potentiometric abrupt change in stoichiometric po