This European Standard specifies two methods for the determination of total organic carbon (TOC) in undried waste samples containing more than 1 g carbon per kg of dry matter (0.1% w/w). When present, elementary carbon, carbides, cyanides, cyanates, isocyanates and thiocyanates may be determined as organic carbon using the methods described in this standard. An interpretation of the measured value may therefore be problematical in cases where the waste contains high levels of the above mentioned components. If needed, they have to be determined separately.