B DETERMINATION OF IRON BY ICP-OES

1 Solutions with iron compounds are nebulised into an argon plasma, where all components are vaporised. Iron compounds are dissociated and excited, and then emit radiation of which the intensity is measured at a wavelength of 259.94 nm. 

1 This procedure yieids a standard curve that is linear up to at least 100 mg/L Fe. 

2 The detection iimit is approximately 0.002 mg/L in the digest. The determination limit is approximately 0.06 mg/L (0.66 respectively 2.0 mg/kg in the dried plant 

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 atomic emission spectrometer. 

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