1. A method of determining a pollutant emission occurring during operation of an internal combustion engine, the method comprising: acquiring, at a plurality of predetermined crankshaft angles, at least one cylinder pressure at each crankshaft angle; determining a plurality of scanning values of a heating rate, wherein each scanning value is assigned to a respective acquired cylinder pressure, and wherein the scanning values of the heating rate are provided to a model as input values; acquiring a crankshaft angle assigned to an initiation of combustion, wherein said crankshaft angle is provided to the model as an input value; ascertaining an air/fuel ratio, wherein the air/fuel ratio is provided to the model as an input value; ascertaining an exhaust gas recirculation rate, wherein the exhaust gas recirculation rate is provided to the model as an input value; and determining the pollutant emission as a function of the input values of the plurality of scanning values of a heating rate, the crankshaft angle assigned to the initiation of combustion, the air/fuel ratio, and the exhaust gas recirculation rate using the model.