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2072517 
Technical Report 
Influence of digestion methods on the determination of total aluminum in food samples by ICP-ES 
Schelenz, R; Zeiller, E 
1993 
BIOSIS/93/13114 
J ANAL CHEM 
1 
68-71 
eng 
BIOSIS COPYRIGHT: BIOL ABS. To determine total Al in a variety of food and total diet samples using ICP-ES, HF pre-treatment, prior to wet digestion (HNO3lO4) seems to be necessary. Compared with results obtained after HF pre-treatment, the determination of Al using pressure microwave digestion with HNO3 or HNO3/HClO4 digestion recovered only between 25-50% Al for dried spinach and flour and 40-75% for total diet samples, respectively. In most cases the addition of 0.25 ml HF (40%) per gram dry mass resulted in maximum Al yield. The results are in acceptable agreement with those obtained by neutron activation analysis (NAA)./TOXICITY