In this issues basic analytical procedures and techniques are introduced comprising fundamental steps like sampling and sample storage, aspects of sample treatment like extraction and fractionation procedures and finally the specific techniques used for organic analyses on partially very low concentration levels such as mass spectrometry or infrared spectroscopy. Beside the technical aspects also application on organic-geochemical problems and the standard data evaluation practice is introduced. Finally, special chapters point to analytical pitfalls and to principal standard operation procedures. The intention of this issue is to get the readers familiar with analytical Organic Geochemistry and to enable them to assess the quality and suitability of specific analytical approaches, in particular with respect to the organic-geochemical problems.