Sigma-Aldrich Nitrite Ic-Std 1000 Mg/L 5

Quality Level

100

Technique(S)

ion chromatography: suitable

Ph

7 (20 °C in H₂O)

Application(S)

environmental
food and beverages

Format

single component solution

Storage Temp.

15-25°C

Related Categories

Chromatography Standards

Ion Chromatography Standards

Analysis Note

Concentration β (NO₂⁻): 990 - 1010 mg/l
Determination method: Cerimetric titration.
The content of this solution was determined by back-titration with Ammonium(II) ferrous sulfate (article number 1.03792) standardized by Cerium(IV) sulfate (article number 1.09092) against volumetric standard Iron(II)ethylendiammonium sulfate (article number 1.02402). The expanded measurement uncertainty is ± 0.7 % (k=2 coverage factor for 95% coverage probability). The certified value is traceable to primary standard NIST SRM 8040 (NIST: National Institute of Standards and Technology, USA) by means of volumetric standard Iron(II)ethylendiammonium sulfate measured in the accredited calibration laboratory of Merck KGaA, Darmstadt, Germany in accordance to DIN EN ISO/IEC 17025.CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany