Analysis of polluted surfaces by time resolved laser induced breakdown spectroscopy

Detection limits for the main heteroatoms in pollutants and chemical agents have been determined in atmospheric conditions with the use of the time re solved laser-induced breakdown spectroscopy (TRELIBS) method. This method p resents many advantages for detection in hazardous or corrosive gas mixture s where sampling systems are not usable. Moreover, low concentrations of fl uorine, chlorine, phosphorus, sulfur and carbon can be measured with short analysis time. Results from gas analysis led us to determine the possibilit ies of this method to detect these atoms on targets (PVC and PTFE). We have studied parameters of plasma creation and spectrum acquisition to find the optimal working conditions of the experimental setup.