TY - CONF A1 - Gottlieb, Cassian A1 - Wilsch, Gerd A1 - Feierabend, A. A1 - Bohling, Ch. A1 - Schilder, C. T1 - On-site carbon analysis of coal using a mobile LIBS system N2 - The information about the chemical composition of coal is of great interest during mining, sorting and processing. Due to great variations of the soil layers the quality of coal suffers great fluctuations during mining because of adjoining rocks [1-6]. To provide on-site analysis of coal the application of LIBS as a multi-element method has been tested. Therefore different qualities of coal have been chemically analyzed to get reference values for the water content as well as for the major (carbon) and minor components (ash = Ca, Mg, S, Si). For the LIBS analysis a system using a low energy laser with a wavelength of 1064 nm, pulse energy of 3 mJ, pulse length of 1.5 ns and a repetition rate of 100 Hz have been used. A compact czerny turner spectrometer operating in the UV range (Δλ = 170 nm – 350 nm) have been applied. To provide quantitative concentrations different calibration curves have been evaluated using chemometrics. The system has been validated using internal cross-validation as well as an external set of samples. For the evaluation of the method different figures of merit will be presented. After applying LIBS for coal analysis in the laboratory a LIBS system for the on-site analysis has been tested during the mining process. T2 - 9th International Conference on Laser Induced Breakdown Spectroscopy (LIBS2016) CY - Chamonix, Switzerland DA - 12.09.2016 KW - LIBS KW - On-site LIBS KW - Coal PY - 2016 AN - OPUS4-37420 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -