Total Sulfur

Total Sulfur (TS) stands for the sum parameter of all organic and inorganic sulfur compounds. Trace levels (0.02 – 10.000 mg/kg or ppm by weight) of Total Sulfur are measured with an elemental combustion analyzer according to UV-Fluorescence detection technique or Microcoulometric detection technique. These measurements are carried out mainly in the Oil & Gas Industry.

The hydrodesulfurization feedstocks consisting of naphtha, kerosene, diesel oil, heavy oils, include many organic sulfur compounds, for example Thiols, Thiophenes, and Organic Sulfides. These organic sulfur compounds are products of the degradation of sulfur containing biological components, present during the natural formation of the fossil fuel; crude oil.

The latest environmental regulations like the TIER III and EURO V wield a maximum of 10 mg/kg of Total Sulfur or ppm by weight in diesel oils. This maximum amount of 10 ppm is also included in the Chinese norms GB 19147-2013 for Diesel fuels and GB 17930-2013 for Gasoline, deriving from the CHINA 5 environmental program which shall be fully implemented by the end of 2017.

The hydrodesulfurization process takes place to lower the Total Sulfur number. The final product is measured with an elemental combustion analyzer according to pulsed UV-Fluorescence-or Microcoulometric Titration to monitor the amount of Total Sulfur.

International methods to measure the amount of Total Sulfur according to UV-Fluorescence detection technique: ASTM D5453, ASTM D6667, ASTM D7183, ISO 20846, SH/T 0689.

International methods to measure the amount of Total Sulfur according to Microcoulometry detection technique: ASTM D3120, ASTM D3246, ASTM D3961, GB/T 11061, SH/T 0253.