Animal feeding stuffs — Determination of potassium and sodium contents — Methods using flame-emission spectrometry
NORMA vydána dne 24.8.2000
Označení normy: ISO 7485:2000
Datum vydání normy: 24.8.2000
Počet stran: 10
Přibližná hmotnost: 30 g (0.07 liber)
Země: Mezinárodní technická norma
Kategorie: Technické normy ISO
Description / Abstract: This International Standard specifies a calibration method and a standard addition method for the determination of potassium and sodium contents of animal feeding stuffs by flame-emission spectrometry. The standard addition method applies if it is not known whether the emissions measured for potassium or sodium are subject to matrix effects. The limit of determination for potassium and sodium is 0,04 g/kg. The calibration method applies if such matrix effects have been shown to be absent.