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
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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.
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
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
法规信息
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Annie Ren et al.
Clinica chimica acta; international journal of clinical chemistry, 542, 117276-117276 (2023-03-05)
We evaluated analytical and Sigma performance for 6 next generation chemistry assays on the Abbott Architect c8000 system. Albumin with bromocresol purple or green, amylase, cholesterol, total protein, and urea nitrogen were analyzed using photometric technology. Analytical performance goals were
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