1994 Volume 43 Issue 5 Pages 383-387
The chloride ion and sulfate ion in waste acid were determined by an X-ray diffraction method. Chloride ion was transformed to silver chloride by silver nitrate and sulfate ion was transformed to barium sulfate by barium chloride. Obtained samples were analysed by an X-ray diffraction method. Cluster analysis and principal component analysis were carried out using the intensities of the relevant peaks in order to estimate the content of chloride ion and sulfate ion. In the analysis, silver iodide and iron(III) oxide were used as an internal standard for chloride ion and sulfate ion, respectively. Furthermore, the blend composition ratio was calculated more accurately by principal component score. Consequently, we could obtain accurate experimental values.
