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Water Chemicals Codex (1982) / Chapter Skim
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Tetrasodium Pyrophosphate
Pages 72-73

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From page 72...
... Purity Requirements: NAS/CWTC 039/82 Na4P2O7 · 1OH2O 446 Analyses of available grades of tetrasodium pyrophosphate show the presence of cadmium and lead but at levels far below that which would necessitate RMIC values based on a maximum dosage of 14 mg/liter. Bulk Sample Collection: Sample in accordance with the Standard for Sodium Tripolyphosphate, AWWA B503-78, American Water Works Association, Denver, Colorado (1978)
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From page 73...
... Sample Analyses: The analyses are to be performed on the tetrasodium pyrophosphate solution in accordance with: Standard Methods for the Examination of Water and Wastewater, 15th Edition, American Public Health Association, Washington, D.C.
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Key Terms

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  • deionized distilled
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  • rmic values
  • standard methods

  • volume below
  • sodium tripolyphosphate
  • lead section
  • public health
  • cadmium lead

  • gently heat
  • american public
  • bulk sample
  • american water
  • analytical sample


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