If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
1.19899
Nitrit-Standardlösung
traceable to SRM from NIST NaNO2 in H2O 1000 mg/l NO2 Certipur®
Synonym(e):
Nitrite standard for aqueous matrices ready foruse
Über diesen Artikel
Quality Segment
technique(s)
chromatography: suitable, ion chromatography: suitable
pH
7 (20 °C in H2O)
application(s)
environmental
food and beverages
format
single component solution
storage temp.
15-25°C
Analysis Note
Bestimmungsverfahren: Cerimetrische Titration.
Der Gehalt dieser Lösung wurde mittels Rücktitration mit Ammonium(II)-Eisensulfat (Artikelnr. 1.03792), standardisiert durch Cer(IV)-Sulfat (Artikelnr. 1.09092) gegen den volumetrischen Standard Eisen(II)-Ethylendiammoniumsulfat (Artikelnr. 1.02402) bestimmt. Die erweiterte Messunsicherheit beträgt ± 0,7 % (Überdeckungsfaktor k=2 für eine Überdeckungswahrscheinlichkeit von 95 %). Der zertifizierte Wert ist rückführbar auf den Primärstandard NIST SRM 8040 (NIST: National Institute of Standards and Technology, USA) anhand des volumetrischen Standards Eisen(II)-Ethylendiammoniumsulfat, der im akkreditierten Kalibrierlabor der Merck KGaA, Darmstadt, Deutschland gemäß DIN EN ISO/IEC 17025 gemessen wird.
Other Notes
Legal Information
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Lagerklasse
12 - Non Combustible Liquids
Was ist los?
WGK 2
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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