Compact metallic sample, direct analysis

With compact metallic samples, direct analysis by AAS can also be applied. 

Sample preparation is much the same as for other GD couplings to instruments. Metal or alloy discs, and compacted conducting samples, are the most frequently used. Solution samples have been examined by deposition onto graphite, aluminium and copper cathodes. Quantitative analyses are usually performed by using a calibration graph run from standard reference materials, a process that takes considerably more time than preparing a solution-based curve. Conversely, time is saved in the direct analysis of solids also, the inert atmosphere of a GD cell reduces the spectral interferences frequently encountered in flame atomizers. 

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