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    STUDIA CHEMIA - Issue no. 1-2 / 1999  
         
  Article:   OPTIMIZATION OF THE FLAME ATOMIC EMISSION DETERMINATION OF MAGNESIUM IN THE METHANE - AIR FLAME.

Authors:  LADISLAU KÉKEDY-NAGY, EMIL A. CORDOŞ.
 
       
         
  Abstract:  The effect of the flame composition, the observation height in the flame and the bandpass of the monochromator on the emission of magnesium in the methane-air flame were studied. These parameters were optimized in order to achieve the highest signal-to-noise ratio and the lowest detection limit. The best results were obtained with the magnesium line of 371.9 nm at the observation height of 6 mm over the burner head, with the stoichiometric flame and the slitwidth of 0.34 mm. The detection limit of 0.3 0.1 mg/L was obtained at a significance level of 0.05, using the two step Neyman- Pearson criterion.  
         
     
         
         
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