In this article, different kinds of volatile basic organic compounds (n-butylamine, morpholine, ethanolamine, triethylamine, pyridine) were investigated by using amperometric techniques with a narrow-gap cell. In case of bare electrode continuous current increase could be observed from beginning of exposure to the saturated vapour of all chemicals during the repetitive amperometric recording at 2 V working potential. The cell did not respond to triethylamine. When the cell was modified with 5-sulpho-salicylic acid the cell responded quickly and it showed high sensitivity to the investigated compounds. Repeatability was investigated which was satisfactory for all compounds except for ethanolamine and morpholine.