A DETERMINATION OF COBALT BY ICP-OES

1 Solutions with cobalt compounds are nebulised into an argon plasma, where all components are vaporised. Cobalt compounds are dissociated and excited, and then emit radiation of which the intensity is measured at a wavelength of 231.160 nm. 

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

HNOg - HjOj - HF), digest 2.4 (digestion with HNOg - HF). digest 2.6 

1 This procedure yields a standard curve that is linear up to at least 2 mg/L Co. 

2 The detection limit is approximately 0.006 mg/L in the digest. The determination limit Is approximately 0.018 mg/L (2.0 respectively 6.0 mg/kg in dried plant material). 

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