Ecological Systems and Devices Annotation << Back On the problem of hydrogen sulphide obtaining for the analytical purposes Сафин Р.Р., Исмагилова З.Ф., Кириллова Л.Б., Исмагилов Ф.Р. The methods of hydrogen sulphide obtaining for analytical practice are considered. It is shown, that the method of synthesis by heating sulfur and paraffin does not allow to obtain pure hydrogen sulphide. The method based on action of a hydrochloric acid on sulphurous sodium is offered for these purposes.