Detection-limit determination and field-deployment results for the SCAPS fiber-optic laser-induced breakdown spectroscopy (LIBS) cone penetrometer probe are presented. Probe design and issues concerning sample presentation and in situ matrix effects are also addressed. It was observed that a design in which measurements are made by a scanning optical system through a sapphire window in the probe produces detection limits that are at or below the EPA's site screening levels (SSLs) for Pb, Cd, and Cr in sand.

No abstract

A remote fiber optic fluorometer system which incorporates a dual wavelength UV laser excitation source is described. The system provides increased specificity for detection of multiple fluorophores without sacrificing real time sensing capability. Limitations imposed by UV transmission in fused silica fibers are discussed.

No abstract

No abstract