Development of simple permeation device for the generation of hydrogen sulfide

Abstract

A simple permeation device for the generation of low concentrations (ppb) of hydrogen sulfide is described. It is based on the generation of hydrogen sulfide from two solution sources, namely, sodium sulfide and thioacetamide, and its permeation through silicone rubber and Teflon membrane, respectively. The permeated hydrogen sulfide along with the carrier gas (air) was trapped in 10 ml of 0.1 mol l^–1 NaOH–0.1% EDTA and analysed by a standard Methylene Blue method. The relative standard deviation for 10 determinations was found to be 4.9% at the 201 ppb level for one of the developed permeation devices.