Specifies a reduced molybdosilicate spectrophotometric method for the determination of the soluble silica content of phosphoric acid for industrial use. The method can be used for the determination of 1 µg of soluble silica in the presence of 20 mg of phosphorus pentoxide. It is thus, for example, applicable to the determination of soluble silica contents greater than 30 mg/kg if the phosphoric acid contains 60 % of phosphorus pentoxide.

General information

  • Status :  Withdrawn
    Publication date : 1975-07
  • Edition : 1
    Number of pages : 4
  • :
    ISO/TC 47
  • 71.060.30

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