title: Comparative study of laser-induced breakdown spectroscopy measurement using two slurry circulation systems.
abstract: The experimental conditions associated with slurry measurements to achieve good precision by using laser-induced breakdown spectroscopy (LIBS) are examined. LIBS analysis was applied to a special waste slurry sample that contains 85.4% water, 2.5% ferric oxide Fe(2)O(3), 1.7% alumina Al(2)O(3), and small quantities of oxides of boron and chromium. While liquids add challenge to LIBS measurements, the analysis was successfully performed on iron and aluminum. Two slurry circulation systems were devised to overcome the major technical problems associated with LIBS measurements of slurry samples, namely, sedimentation and change in the lens-to-sample distance during measurement. LIBS slurry measurements using both circulation systems are compared. The results show that the experimental configuration plays a crucial role for online slurry analysis.
authors.affiliation: Institute for Clean Energy Technology, Mississippi State University, Starkville, Mississippi 39759-7704, USA.
authors.forename: Seong Yong
authors.initials: SY
authors.lastname: Oh
authors.forename: Tracy
authors.initials: T
authors.lastname: Miller
authors.forename: Fang Yu
authors.initials: FY
authors.lastname: Yueh
authors.forename: Jagdish P
authors.initials: JP
authors.lastname: Singh