FIELD: oil and gas industry.
SUBSTANCE: method involves sampling and preparation of sample with thermostatting at temperature of 50-70°C with simultaneous extrusion of sulphurated hydrogen and light mercaptans with inert gas or air to in-series located absorbing solutions; at that, as absorbing solution for determining sulphurated hydrogen, there used is sodium carbonate solution, and as absorbing solution for determining light mercaptans there used is sodium hydrate solution, quantitative estimation of sulphurated hydrogen and light mercaptans by method of iodimetric titration. At that, before mixture of vapours of light hydrocarbons with sulphurated hydrogen and light mercaptans, which is extruded from the sample with air or inert gas, enters in-series located absorbing solutions, it is cooled to the temperature of more than 15°C to 20°C.
EFFECT: improving accuracy and reliability, and speeding-up the analysis.
5 ex, 3 tbl, 1 dwg
