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20 Οκτ 2023 · A rigorous and metrologically-sound certification of benzoic acid content was conducted by the Chemical Sciences Division that comprised coulometric assays in conjunction with multiple calibration schemes for an internal standard qNMR technique, as well as a thorough analysis of impurities.
- Michael Nelson
NIST Office of Weights and Measures, 2023 - Present....
- Michael Nelson
Certificate of Analysis. Standard Reference Material® 39j. Benzoic Acid (Calorimetric Standard) This Standard Reference Material (SRM) is intended for use in the calibration and standardization of adiabatic, isoperibol, and aneroid bomb calorimeters.
16 Ιουλ 2020 · National Institute of Standards & Technology. NIST PS1. Primary Standard for quantitative NMR (Benzoic Acid) CERTIFICATE OF ANALYSIS. Purpose: This NIST Certified Reference Material is intended for use as a primary standard for quantitative nuclear magnetic resonance (qNMR) methods.
Features and Benefits. SRM 39J is available with a certificate documenting NIST-certified purity of 0.999996 mol/mol, as measured by coulometer mass spectrometer. The NIST certificate is provided with uncertainty calculation, handling, storage, and use instructions.
A unit of SRM 350b consists of 30 g of benzoic acid. Certified Values: A NIST certified value is a value for which NIST has the highest confidence in its accuracy in that all known or suspected sources of bias have been investigated or taken into account [1].
30 Ιουλ 2018 · A first-of-its-kind NIST reference material, ultra-pure and extensively-characterized PS1 Benzoic Acid Primary Standard for quantitative NMR serves as a definitive, primary reference (calibrant) that assuredly links the quantitative NMR (qNMR) spectroscopy technique to SI base units.
NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites.
