B DETERMINATION OF MANGANESE BY ICP-OES

1 Solutions with manganese compounds are nebulised into an argon plasma, where all components are vaporised. Manganese compounds are dissociated and excited, and then emit radiation of which the intensity is measured at a wavelength of 257.61 Onm. 

1 This procedure yields a standard cun/e that is linear up to at least 2 mg/L Mn. 

2 The detection limit is approximately 0.001 mg/L in the digest. The determination limit is approximately 0.003 mg/L (0.3 respectively 1.0 mg/kg in the dried plant material). 

1 The reproducibility of determinations by this procedure should give, at reasonable control and thorough sample preparation, a coefficient of variation within 5 % + 5 mg/kg. 

1 Inductively coupled plasma optical emission spectrometer. 

---