This paper describes a continuous solution analyzer and is an extension of a previous investigation on fluorescent x-ray spectrographic analysis of solutions (1). Although this laboratory was primarily interested in studies of limited duration, the apparatus is also suitable for con- tinuous process control.
William J. Campbell, "Apparatus for Continuous Fluorescent X-Ray Spectrographic Analysis of Solutions," Appl. Spectrosc. 14, 26-27 (1960)