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Standard

NS-EN 16279:2012

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This European Standard specifies an ion-selective electrode method (ISE) after hydrochloric acid treatment for the determination of fluoride from animal feeding stuffs. The content of fluoride (F-) corresponds to that of fluorine (F) due to Commission Regulation (EU) 574/2011[3]. This European Standard is strictly based on several conventions like the use of 0,5 g test portion for extraction of fluoride from animal feeds by means of an acid treatment with 20 ml of 1 mol/l hydrochloric acid solution at ambient temperature (20 °C to 25 ºC) for 20 min and the control and adjustment of the pH at 5,5 in the buffered test solution before determination of fluoride by ISE using standard addition technique. The method was successfully tested in an interlaboratory 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 can be analysed within the linear calibration function. Only for concentrations lower than 40 mg/kg is the use of an interpolation technique required instead of standard addition Annex C. The quantification limit for fluoride using the conventions of the method including the standard addition technique is 40 mg/kg or lower than 2,5 mg/kg when using interpolation Annex C.

Dokumentinformasjon

  • Standard fra SN
  • Publisert:
  • Utgave: 1
  • Versjon: 1
  • Varetype: NAT
  • ICS 65.120
  • National Committee SN/K 644

Produktrelasjon

  • Adoptert fra: EN 16279:2012 , 0