NBN EN 12485 : 2010

Foreword
1 Scope
2 Normative references
3 General requirements
  3.1 Number of determinations
  3.2 Methods for analysis
  3.3 Sample preparation
  3.4 Reagents
  3.5 Glassware
  3.6 Expression of results
  3.7 Repeatability and reproducibility limits
  3.8 Test report
  3.9 Quality assurance procedures
4 Determination of screen oversize of high-calcium
  lime
  4.1 Air-jet sieving method
  4.2 Wet sieving method
5 Preparation of test solutions
  5.1 Fusion with lithium tetraborate
  5.2 Extraction with hydrochloric acid
  5.3 Microwave digestion with nitric acid
  5.4 Pressurized digestion with nitric acid
6 Conventional methods of determining major and minor
  constituents
  6.1 Determination of free water
  6.2 Determination of carbon dioxide
  6.3 Determination of residue insoluble in hydrochloric
      acid
  6.4 Determination of content of water soluble calcium
      oxide or calcium hydroxide
  6.5 Water-insoluble matter
  6.6 Determination of free CaO in half-burnt dolomite
  6.7 Determination of calcium oxide and magnesium oxide
  6.8 Determination of sulfate content
  6.9 Calculation of composition of commercial product
7 Determination of minor constituents
  7.1 Determination of minor constituents by AAS flame
      technique
  7.2 Determination of minor constituents by ICP-OES
8 Determination of trace elements
  8.1 Determination of lead, cadmium, chromium and
      nickel by AAS graphite tube technique
  8.2 Determination of lead, cadmium, chromium and
      nickel by ICP-OES
  8.3 Determination of arsenic, antimony and selenium
      by AAS hydride technique
  8.4 Determination of mercury by cold-vapour technique
Annex A (informative) Analytical scheme
Annex B (informative) Precision data for the test methods
Bibliography

Describes methods used for the analyses of calcium carbonate, high-calcium lime and half-burnt dolomite used to treat water for human consumption.