METHOD OF DETERMINING HYDROGEN SULFIDE AND LIGHT MERCAPTANS IN CRUDE OIL, PETROLEUM DERIVATIVES, AND GAS CONDENSATE Russian patent published in 2006 - IPC G01N33/22 G01N33/26 G01N31/16 C01B17/16 C07C321/04 

FIELD: analytical methods in petroleum industry.

SUBSTANCE: invention relates to analytical checking of crude oil, petroleum derivatives, and gas condensate quality. 2 to 5g sample is thermostatically controlled at 50-70°C, while simultaneously hydrogen sulfide and light mercaptans are for 2-5 min displaced by inert gas or air into in series arranged absorption solutions, namely sodium carbonate solution for determining hydrogen sulfide and sodium hydroxide solution for determining light mercaptans. After complete withdrawal of hydrogen sulfide and light mercaptans, their quantitative content is determined by means of iodometric titration method.

EFFECT: extended range of analyzed products, increased determination accuracy, shortened analytical procedure, and enabled carrying out analyses not only in stationary laboratory without deviation from standardized procedures.

1 dwg, 1 tbl