1.19899

Supelco

Nitrite standard solution

traceable to SRM from NIST NaNO₂ in H₂O 1000 mg/l NO₂ Certipur®

Synonym(s):
Nitrite standard for aqueous matrices ready foruse
Pricing and availability is not currently available.

storage conditions

Store at +15°C to +25°C.

Quality Level

CofA

certificate is enclosed in each package

application(s)

ion chromatography: suitable

pH

7 (20 °C in H2O)

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.

Legal Information

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany
Protocols
Photometric determination using the Griess method subsequent to extraction
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