Single column ion chromatography of weak inorganic acids: Analytical capability for materials and process characterization.
01 January 1986
The scope of single column ion chromatography (SCIC) includes the separation and direct conductometric detection of anions of weak inorganic acids. Resolution of mixtures containing borate, silicate, germinate, fluoride and chloride is an example of separations achieved using a resin-based anion separation column and carefully formulated alkaline eluents. Application of these and other ion chromatography procedures to materials and process characterization requires the development of appropriate sample preparation procedures coupled with judicious selection of eluent composition and operating conditions. Water-insoluble solid samples such as glasses are particularly challenging because reagents required for sample dissolution may introduce large quantities of interfering ions, or produce ionic forms unsuitable for detection. The accuracy of quantitative SCIC analysis is assessed for the determination of boron and fluoride in NBS standard glasses.