B DETERMINATION OF CHROMIUM BY ICP-MS

1 Solutions with chromium compounds are nebuiised into an argon piasma, where aii components are vaporised. The ions produced are entrained in the piasma gas and introduced into a mass spectrometer, sorted according to their mass-to-charge ratios and quantified with a channei eiectron muitipiier. Chromium is determined at mass 52 or 53 amu. 

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

HNO3 - HjOj, - HF), digest 2.4 (digestion with HNO3 - - HF) and digest 2.7 

1 This procedure yields a standard cun/e that is linear up to approximately 50 pg/L 

2 The detection limit is approximately 0.01 pg/L in the digests. The determination limit is approximately 0.03 pg/L (0.3 respectively 1 pg/kg in the dried plant material). 

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