Environmental analysis covers many different applications. The total organic carbon (TOC) is one of the most important screening parameters for the determination of organic pollution in different matrices. In contrast to the analysis of single compound analysis, the TOC value represents the sum of all organic carbon compounds in a matrix or sample. Consequently, it is a parameter, which can be determined fast and effectively to evaluate the organic pollution and quality of water, soil, or waste. For a better understanding of the Earth and its processes, stable isotope analysis is used. It helps us to get deeper insights into the Earth's history and enables research for a better oceanographical, hydrological and ecological understanding. Furthermore, future climate scenarios are built by readings of past earth temperatures, that are extrapolated into the future.