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From page 36... ...
Purity Requirements: Analyses of available grades of fluosilicic acid show the presence of arsenic and lead but at levels far below that which would necessitate RMIC values based on a maximum dosage of 1.2 mg of fluoride ion/liter. If analyses are desired, the following protocol is recommended.
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From page 37... ...
Sample Analyses: The analyses are to be performed on the fluosilicic acid sample 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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