Sulfur content in crude oil and petroleum products is a major problem, as the high content of sulfur in fuel leads to harmful emissions and leads to serious environmental and health risks as a result of emissions from sources that use gasoline as fuel for cars or kerosene as fuel for household heaters, causing serious emissions harmful to health. It is necessary to determine the sulfur content in crude oil, and to determine the type of crude oil (acid or sweet). comparing gasoline and kerosene sulphur content to international regulations to determine the extent to which oil refineries comply with internationally permitted limits and the extent to which sulphur content is linked to API Gravity sampling of several oil fields and refineries at varying intervals and distributed to nine provinces (Muthanna, Diwaniyah, Dhi Qar), Basra-Shuaiba, Maysan, Wasit, Baghdad-Dora refinery, Baiji refinery,The huss. It was concluded that Iraqi crude oil is sour, and laboratory tests showed that all refineries do not adhere to the limits allowed globally and domestically in terms of gasoline and kiros production, and the results showed a strong relationship between sulfur content and API Gravity.

Estimating the concentration of sulphur compounds in crude oil and its products such as gasoline and kerosene is necessary because of environmental legislation and determinants developed by government organizations regulating sulphur levels in oil and its derivatives. Sulphur compounds found in crude oil and its products are a major problem, causing many environmental and health risks as a result of the use of gasoline as fuel for cars and kerosene as fuel for household heaters, resulting in the emission of these compounds in the form of oxides, affecting the environment and health. This study was conducted to estimate the concentration of sulphur compounds in crude oil and distillation products represented by gasoline and kerosene and to show how different the concentration of sulphur compounds in crude oil is than in gasoline and kerosene. In this study, gas chromatography technology was used. This method applies to distillation products, gasoline fuel, kerosene and other petroleum liquids. This study was conducted in basra oil company's quality control laboratories to estimate the concentration of sulphur compounds in crude oil, gasoline and kerosene.