[Determination of aluminum traces in dialysis concentrates]

To determine traces of aluminium in dialyse concentrates trouble free and accurate by atomic absorption spectrometry a special procedure of enrichment was developed. The aluminium chromazurol S complex is adsorbed selectively at polyethylene powder whereby the disturbanced matrix (KCl) is separated. After elution by a 0.3% ethanolic solution of nitric acid the determination of aluminium is carried out by the graphite oven (flameless) atomic absorption spectrometry. All used materials have to be cleaned carefully. The determination limit for aluminium is 5 micrograms/l dialyse concentrate (the IUPAC commended limit is 15 micrograms/l).