A DETERMINATION OF CADMIUM BY FLAME AAS

1 The sample is nebulised Into an air-acetylene flame, where it is vaporised cadmium compounds are atomised and the cadmium atoms thus formed absorb radiation from a hollow cathode lamp. The absorbance is measured at a wavelength of 228.8 nm, using background correction. 

2 This determination may be carried out on digest 2.3 (microwave digestion with 

HNO3 - H2O2 - HF), digest 2.4 (digestion with HNO, - - HF), digest 2.6 

1 This procedure yields a standard curve that is linear up to approximately 0.8 mg/L Cd. 

2 The detection limit is approximately 0.02 mg/L in the digest. The determination limit is approximately 0.06 mg/L (3.0-7.5 mg/kg in dried plant material). 

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