Extension and improvement of the methanol‐ d 4 NMR thermometer calibration

Autor:	Dieter Heyer, Stephan Krenek, Niels Karschin, Christian Griesinger
Rok vydání:	2021
Předmět:	International Temperature Scale of 1990 Work (thermodynamics) chemistry.chemical_compound chemistry Spectrometer Calibration curve Thermometer Chemical shift Analytical chemistry Calibration General Materials Science General Chemistry Methanol
Zdroj:	Magnetic Resonance in Chemistry. 60:203-209
ISSN:	1097-458X 0749-1581
DOI:	10.1002/mrc.5216
Popis:	NMR thermometers are a convenient way to determine the temperature inside the sample of an NMR spectrometer. They rely on signals with strongly temperature-dependent chemical shifts, often of OH groups; 99.8% perdeuterated methanol is an established example which is particularly well suited for modern, high-sensitivity spectrometers, but it is so far calibrated only in the range of 282 to 330 K. In this work, we extend this calibration to the entire liquid range of methanol, 175 to 338 K. Additionally, we use a temperature sensor calibrated traceably to the International Temperature Scale (ITS-90) and accounted for the magnetic field effect on the sensor, yielding a more accurate calibration curve with an uncertainty (2σ) varying between 25 and 190 mK.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cc69f4a9c3c3af4f2bf026d88492a813 https://doi.org/10.1002/mrc.5216 Zobrazit plný text záznamu