Interference in furnace AAS

After the completion of the procedure above described, the concentration factor was 200-fold, and alkali and alkaline earth elements, which often provide spectral interferences in furnace AAS, could be removed. The overall recoveries were examined by using seawater samples spiked with nsmCd, 64Cu and 65 Zn, and were 98.9 0.7% (n = 10) for Cd, 97.9 1.2% (n = 3) for Cu and 99.0 0.8% (n = 5) for Zn. The experimental results obtained by Bruland and Franks are shown in Figs. 1 and 4 and Table 3. 

In AAS and AFS, limitations to the analytical accuracy are mostly related to physical and chemical interferences and are due less to spectral interferences. In furnace AAS thermochemical processes limit the achievable accuracy and necessitate temperature programs to be carefully worked out in order to cope with errors arising from thermochemical effects. In AFS and also in LEI, it is necessary to control matrix influences relating to quenching when analyzing real samples. 

Interference in furnace AAS is much higher than in flame AAS. This applies both for physical and chemical interference. 

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See also in sourсe #XX -- [ ]

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