ABSTRACT
Two field tests were performed to demonstrate the ability of the laser-induced fluorescence–excitation-emission matrix (LIF-EEM) probe to collect semiquantitative data on classes of organic compounds in subsurface soils and to demonstrate advantages of LIF instrumentation that uses simultaneous multiple wavelength excitation. Field work at each test site involved advancement of the LIF probe through soils by the cone penetrometer technology (CPT) equipment and collection of fluorescence data using the LIF-EEM instrumentation. A component of the field activities included soil sampling and analysis to validate the LIF-EEM data. Complete integration of the LIF-EEM and CPT control systems is a realistic goal. Automatic triggering will provide additional important advantages to the LIF-EEM tool. The LIF-EEMs were analyzed using standard EEMs made in the laboratory with the same instrumentation and methodology to identify and semiquantify the Polycyclic aromatic hydrocarbons contaminants.
