Method for measuring silicon dioxide content in solution

Method for measuring silicon dioxide content in solution

  • CN 101,988,892 A
  • Filed: 07/30/2009
  • Published: 03/23/2011
  • Est. Priority Date: 07/30/2009
  • Status: Active Application
First Claim
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1. the assay method of dioxide-containing silica in the solution comprises the steps:

  • The silicon dioxide standard solution of preparing the following concentration of a series of 5ppm places color comparison tube respectively, with distilled water diluting to scale;

    The pH that adds sulfuric acid adjustment criteria solution is 1.2;

    Add excessive ammonium molybdate solution, shake up and leave standstill 20~

    30 minutes;

    Add excessive oxalic acid solution again, add the excessive ferrous sulfate ammonium salt solution immediately, shake up and leave standstill 15 minutes;

    Not add SiO 2A blank solution as reference liquid, on spectrophotometer, measure absorbance, draw the silicon dioxide typical curve;

    Get an amount of solution to be measured in color comparison tube, with distilled water diluting to scale;

    The pH that adds sulfuric acid regulation solution is 1.2, adds excessive ammonium molybdate solution, shakes up and leave standstill 20~

    30 minutes;

    After adding excessive oxalic acid solution again, add the excessive ferrous sulfate ammonium salt solution immediately, shake up and leave standstill 15 minutes;

    As reference liquid, on spectrophotometer, measure absorbance with same blank solution;

    According to the silicon dioxide typical curve of drawing and the solution absorbency to be measured of mensuration, calculate the content of silicon dioxide in this solution.

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