RAPID-DETERMINATION OF LIMESTONE USING PHOTOACOUSTIC-SPECTROSCOPY

Rapid and accurate determinations of limestone in lime products would be useful for process control applications in the lime industry. The l oss-on-ignition method commonly used for determining residual limeston e is very time consuming and prone to error. In this study, the feasib ility of using photoacoustic spectroscopy (PAS) as a process control t ool in the lime industry was investigated. Results from preliminary PA S measurements on samples prepared in the laboratory indicated that a low-cost dedicated analyzer employing PAS has excellent potential. (C) 1997 Elsevier Science Ltd.