717384

ISO 3360:1976

Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) -- Determination of fluorine content -- Alizarin complexone and lanthanum nitrate photometric method

standard by International Organization for Standardization , 08/01/1976

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Full Description

Applicable to products the F content of which is equal to or more than 0.5 mg/kg. Specifies the separation of the element from a test portion by steam distillation in a phosphoric acid medium. Formation of a blue-coloured complex with a combined reagent alizarin complexone/lanthanum nitrate in a buffered medium at the pH of 4.6. Addition of acetone to increase the stability of the complex and the sensitivity. Photometric measurement of the complex at a wavelength of about 600 nm.

 

Product Details

Published:
08/01/1976
Number of Pages:
5
File Size:
1 file , 400 KB
Note:
This product is unavailable in Ukraine, Russia, Belarus