Bestimmung von Arsen in biologischem Material mittels Atomabsorptionsspektralphotometrie |
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| Authors: | H Woidich W Pfannhauser |
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| Institution: | 1.Forschungsinstitut der Ern?hrungswirtschaft,Wien,?sterreich |
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| Abstract: | A modified determination of arsenic by means of AAS is described. AsH3 generation is carried out in a reaction vessel by addition of NaBH4. The gas evolved is swept into a nitrogen entrained air flame. The detection limit amounts to 10 ng of arsenic.In the dry ashing step used for biological materials Mg(NO3)2 is used as an ashing aid. It was found, that an excess of four times of Mg(NO3)2 is necessary for finding all arsenic present. An ashing temperature of 500° C is suitable. 2 h of ashing time is enough if the samples are carefully preashed. Various foods have been analysed, mainly all higher burdened species. Arsenic contents in drinking water and some detergents have also been investigated. |
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