ISO 6918:1984
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ISO 6918:1984
13437

Abstract 

A test solution is prepared by one of the two following ways: a) fusion of a test portion with sodium carbonate in the case of total calcium and magnesium contents, and b) from an aliquot portion of "solution A" (ISO 2217) for alkali-soluble calcium and magnesium contents. Lanthanum ions are added to the solution to suppress certain interferences. The solution is aspirated into an acetylene/dinitrogen monoxide flame and the measurement are carried out at a wavelength of 422.7 nm (calcium line) and of 285.2 nm (magnesium line).


General information 

  •  :  Withdrawn
     : 1984-11
  •  : 1
     : 4
  •  : ISO/TC 47 Chemistry
  •  :
    71.060.50 Salts

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