ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 27, Number 5
JKCSEZ 27(5)
October 20, 1983 

Using a column of macrorecticular gel beads impregnated with alcohol solution of diphenylcarbarzide (DPC), the enrichment of Cr(Ⅵ) ion in 0.1M sulfuric acid was investigated. The column performance was compared with respect to the types of solid support such as Amberlite XAD and Diaion HP. Diaion HP-20 was found to be most suitable for this purpose. The break through point was increased when increasing the amount of DPC absorbed in the resin and the concentrated sample solution showed higher break through capacity than the dilute one. The extraction of Cr(Ⅵ) was not affected by the presence of 100 ppm Fe(Ⅲ) which amounted to ten times of 10 ppm Cr(Ⅵ) and the presence of other metal ions which amounted to 100 times of 10 ppm Cr(Ⅵ). Because the used gel particles were effectively regenerated with methanol, they were able to be used repeatedly.