ISO 3360:1976

$13.00

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

Published By	Publication Date	Number of Pages
ISO	1976-08	7

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Categories: 67.220.20 - Food additives, 71.060.30 - Acids, 71.060.50 - Salts, ISO

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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.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	1976-08
Pages Count	7
Language	France
Edition	1
File Size	389.1 KB
ICS Codes	67.220.20 - Food additives 71.060.30 - Acids 71.060.50 - Salts

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ISO 3360:1976

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