Determination of aluminium in the edible part of fish by GFAAS after sample pretreatment with microwave activated oxygen plasma

An analytical method for the determination of aluminium in the edible part of fish was developed using a new pre-treatment method in a microwave activ ated oxygen plasma and graphite furnace atomic absorption spectrometry. The linearity of the calibration line as well as of different standard additio n lines were very good within the measurement area of 0-60 mu g A1/L. The r ecovery with spiked ocean perch fillet was good. The unsatisfactory recover y of aluminium with the reference-material (mussel tissue) may be due to hi gh quantities of insoluble aluminium-silicates. An installed quality-contro l-card indicated that the method showed no significant fluctuation as well as contamination over the complete analysis time. The limit of detection ca lculated as 3 times the standard deviation of the blank absorbance divided by the slope of the calibration line was 1 mu g A1/L.