Direct determination of aluminum in drinking and natural waters as 8-hydroxyquinoline chelate by RP-HPLC

Determination of trace aluminum in the form of 8-hydoxylquinoline chelate b y reversed phase high performance liquid chromatography and spectrophotomet ric detection is described in this paper. The optimization of the experimen tal conditions including precolumn complexation, chromatographic separation , and detection wavelength is comprehensively investigated. The response is linear from 0.002 to 0.3 mug/mL with a detection limit of 0.002 mug/mL. Th e relative standard deviation is 3.6% at an A1 concentration of 0.2 mug/mL. The reliability of the entirely optimized procedure is confirmed by the di rect analyses performed on ten real drinking and natural water samples.