Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization
The use of hyperpolarized media in combination with benchtop NMR spectrometers is currently extensively investigated to enable cost effective but highly sensitive applications. In this work, the instrumentation for the use of hyperpolarized 129Xe gas on a commercial benchtop-NMR spectrometer in a fu...
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Elsevier
2025-03-01
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| Series: | Journal of Magnetic Resonance Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666441024000347 |
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| author | Wolfgang Kilian Samira Gulich Thomas Riemer Lorenz Mitschang |
| author_facet | Wolfgang Kilian Samira Gulich Thomas Riemer Lorenz Mitschang |
| author_sort | Wolfgang Kilian |
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| description | The use of hyperpolarized media in combination with benchtop NMR spectrometers is currently extensively investigated to enable cost effective but highly sensitive applications. In this work, the instrumentation for the use of hyperpolarized 129Xe gas on a commercial benchtop-NMR spectrometer in a fully controllable yet automated mode is presented. A continuous-flow 129Xe polarizer is operated inline with the benchtop spectrometer. While the adjustment of the xenon gas partial pressure in the range of mbar to bar as well as the volume flow through the NMR sample is facilitated by the polarizer’s mass-flow controllers and two back-pressure regulators, respectively, the gas flow towards the NMR sample in situ in the benchtop magnet is time-controlled within the spectrometer’s RF pulse sequence programming. A calibration procedure for the gas flow control as well as thermally polarized xenon gas standards are introduced for quantification of the absolute 129Xe polarization. In this way, the 129Xe polarization achieved in the NMR measurement is determined in the 50% to 5% regime for very lean 1mbar to high 500mbar xenon partial pressure, respectively – in the optimum a more than 250,000-fold increase in comparison to thermal polarization. Such instrumentation may be implemented by combining any of the well-established continuous-flow 129Xe polarizer with any of the commercial benchtop spectrometers, thus facilitating high-performance hyperpolarized 129Xe benchtop NMR studies. |
| format | Article |
| id | doaj-art-3d445875e11c4106a60ea59eef7bfc1a |
| institution | Kabale University |
| issn | 2666-4410 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Magnetic Resonance Open |
| spelling | doaj-art-3d445875e11c4106a60ea59eef7bfc1a2024-12-14T06:33:10ZengElsevierJournal of Magnetic Resonance Open2666-44102025-03-0122100179Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarizationWolfgang Kilian0Samira Gulich1Thomas Riemer2Lorenz Mitschang3Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany; Corresponding author.Physikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, GermanyPhysikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, Germany; University of Leipzig, Medical Faculty, Institute of Medical Physics and Biophysics, Härtelstr. 16-18, 04107 Leipzig, GermanyPhysikalisch-Technische Bundesanstalt (PTB), Abbestr. 2-12, 10587 Berlin, GermanyThe use of hyperpolarized media in combination with benchtop NMR spectrometers is currently extensively investigated to enable cost effective but highly sensitive applications. In this work, the instrumentation for the use of hyperpolarized 129Xe gas on a commercial benchtop-NMR spectrometer in a fully controllable yet automated mode is presented. A continuous-flow 129Xe polarizer is operated inline with the benchtop spectrometer. While the adjustment of the xenon gas partial pressure in the range of mbar to bar as well as the volume flow through the NMR sample is facilitated by the polarizer’s mass-flow controllers and two back-pressure regulators, respectively, the gas flow towards the NMR sample in situ in the benchtop magnet is time-controlled within the spectrometer’s RF pulse sequence programming. A calibration procedure for the gas flow control as well as thermally polarized xenon gas standards are introduced for quantification of the absolute 129Xe polarization. In this way, the 129Xe polarization achieved in the NMR measurement is determined in the 50% to 5% regime for very lean 1mbar to high 500mbar xenon partial pressure, respectively – in the optimum a more than 250,000-fold increase in comparison to thermal polarization. Such instrumentation may be implemented by combining any of the well-established continuous-flow 129Xe polarizer with any of the commercial benchtop spectrometers, thus facilitating high-performance hyperpolarized 129Xe benchtop NMR studies.http://www.sciencedirect.com/science/article/pii/S2666441024000347Benchtop NMRHyperpolarized 129XeAbsolute polarizationIn-situ sample gas saturation |
| spellingShingle | Wolfgang Kilian Samira Gulich Thomas Riemer Lorenz Mitschang Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization Journal of Magnetic Resonance Open Benchtop NMR Hyperpolarized 129Xe Absolute polarization In-situ sample gas saturation |
| title | Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization |
| title_full | Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization |
| title_fullStr | Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization |
| title_full_unstemmed | Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization |
| title_short | Hyperpolarized 129Xe for benchtop NMR: Inline instrumentation for automated yet flexible operation yielding high polarization |
| title_sort | hyperpolarized 129xe for benchtop nmr inline instrumentation for automated yet flexible operation yielding high polarization |
| topic | Benchtop NMR Hyperpolarized 129Xe Absolute polarization In-situ sample gas saturation |
| url | http://www.sciencedirect.com/science/article/pii/S2666441024000347 |
| work_keys_str_mv | AT wolfgangkilian hyperpolarized129xeforbenchtopnmrinlineinstrumentationforautomatedyetflexibleoperationyieldinghighpolarization AT samiragulich hyperpolarized129xeforbenchtopnmrinlineinstrumentationforautomatedyetflexibleoperationyieldinghighpolarization AT thomasriemer hyperpolarized129xeforbenchtopnmrinlineinstrumentationforautomatedyetflexibleoperationyieldinghighpolarization AT lorenzmitschang hyperpolarized129xeforbenchtopnmrinlineinstrumentationforautomatedyetflexibleoperationyieldinghighpolarization |