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About This Item
NACRES:
NA.24
UNSPSC Code:
41116107
grade
certified reference material
description
NIST® SRM® 921b
form
crystals
packaging
pkg of 25 g
manufacturer/tradename
NIST®
technique(s)
Karl-Fischer titration: suitable, NMR: suitable, ion chromatography: suitable, liquid chromatography (LC): suitable
application(s)
clinical testing
General description
Each unit of SRM 912b contains 25 grams of high-purity crystalline urea. A unit of SRM 912b consists of 25 g of high-purity crystalline urea.
SRM 912B_cert
SRM 912B_SDS
SRM 912B_cert
SRM 912B_SDS
Application
NIST Urea is intended for use as a primary calibrant for the measurement procedures and validating methods used in clinical pathology laboratories to determine urea blood nitrogen.
Other Notes
- The NIST-certified mass fraction value for urea was determined using a mass balance approach for purity assessment, and the values are metrologically traceable to the SI derived unit for mass fraction, expressed as a percentage.
- Maintenance and expiration of SRM certification, instructions for handling, storage, and use are provided on NIST certificate.
Legal Information
NIST is a registered trademark of National Institute of Standards and Technology
SRM is a registered trademark of National Institute of Standards and Technology
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Certificates of Analysis (COA)
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