Crude oil is the lubricant of the worlds economy. Numerous parameters define the quality of petroleum products and their derivatives. Metrohms new brochure Petrochemical Analysis is a summary of the most important of these quality parameters and the methods used to check them. It can be ordered free of charge and it draws on the companys comprehensive know-how in assuring the quality of petroleum products. Using the most important national and international standards (ASTM, DIN, ISO, UOP ) as a basis, it suggests methods as well as instrumentation suited best to check crucial parameters.