ISO 3360:1976
Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric method
OVERVIEW
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.
COMMENTS
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PRODUCT DETAILS
Status | Current |
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Edition | 1976 |
No. of Pages | 5 |
ICS Classification | 71.060.50 Salts 71.060.30 Acids 67.220.20 Food additives |
Committee | ISO/TC 47 |
Available for Purchase | For sale in Singapore only |
Adoption | ISO |