Trace enrichment of aluminium ions on immobilized desferrioxamine

✍ Scribed by Lennart Ljunggren; Ina Altrell; Lars Risinger; Gillis Johansson

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 542 KB
• Volume: 256
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(92)85329-5

✦ Synopsis

Alummmm was quantltatlvely preconcentrated m a flow-mlectlon system usmg a column contammg desfernoxamme lmmobdlzed on porous glass The metal ions were eluted with 2 M mtnc acid for determination by atoruc absorption spectrometry It was necessary to add a soluble chelate former to prevent prec@ation of alununmm hydroxides from the standard solutions Computer modellmg with known equdibrmm constants mdlcated that a buffer Hrlth lactate as a hgand was adequate

The pH range was restncted to 5 5-6 0 for quantitative uptake of alummmm ions because of the competdion of protons with the bmdmg sites of desfernoxamme m the acidic region and prec@atlon of hydroxides m the alkaline region The hgand-exchange kmetics were also of Importance and the column was therefore kept at 50°C

The umnoblhzed desfernoxamme column showed good stability and could be used contmuously over a penod of at least 2 months Alummmm from peritoneal dialysis solutions was preconcentrated on lmmotnhzed desferrloxamme and determined by graphite furnace atomic absorption spectrometry