Norm

NEN-EN 16279:2011 Ontw. en

Diervoeders - Bepaling van de fluoride inhoud na zoutzuur behandeling door ion-gevoelige elektrodemethode (ISE)

  • Deze norm is ingetrokken sinds 11-07-2012

23,50

Over deze norm

Status Ingetrokken
Aantal pagina's 19
Commissie Diervoeder
Gepubliceerd op 01-06-2011
Taal Engels
This European Standard specifies an ion-selective electrode method (ISE) after hydrochloric acid treatment for the determination of fluoride in animal feeding stuffs. This European Standard is strictly based on several conventions like the use of 0,5 g test portion for extraction of fluoride from feedstuffs by means of an acid treatment with hydrochloric acid 1 mol/l at ambient temperature (20 °C to 25 ºC) for exactly 20 min and the control and adjustment of the pH at exactly 5,5 in the buffered test solution before determination of fluoride by ISE using standard addition technique. The method was successfully tested in an inter-laboratory study in concentrations between 100 mg/kg up to 500 mg/kg. Following strictly this method theoretically all concentrations from 40 mg/kg up to 4 000 mg/kg are to analyse within the linear calibration function. Only for concentrations lower than 40 mg/kg the use of interpolation technique instead of standard addition technique is required (Annex C). The quantification limit for fluoride using the conventions of the method inclusive the standard addition technique is 40 mg/kg or lower than 2,5 mg/kg when using interpolation (Annex C).

Details

ICS-code 65.120
Nederlandse titel Diervoeders - Bepaling van de fluoride inhoud na zoutzuur behandeling door ion-gevoelige elektrodemethode (ISE)
Engelse titel Animal Feeding stuffs - Determination of fluoride content after hydrochloric acid treatment by ion-sensitive electrode method (ISE)
Vervangen door
Normatieve verwijzingen
  • 70/373/EG, Analysemethoden

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