DETERMINATION OF ALUMINIUM BY ICP-MS

1 Solutions with aluminium compounds are nebulised into an argon plasma, where all components are vaporised. The ions produced are entrained in the plasma gas and introduced into a mass spectrometer, sorted according to their mass-to-charge ratios, and quantified with a channel electron multiplier. Aluminium is determined at mass 27 amu. 

1 This procedure yields a standard cun/e that is linear up to at least 1000 pg/L Al. 

2 The detection limit is approximately 0.4 pg/L in the digest. The determination limit is approximately 1.2 pg/L (1.3 respectively 4 mg/kg in the dried plant material). 

1 Interferences are expected from Fe and B P due to mass overlap with Al. 

1 The reproducibility of determinations by this procedure should give, at reasonable control and thorough sample preparation, a coefficient of variation within 10 %. 

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