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Updated: Jun 27, 2026

Real-Time Metabolic Detection in Living Cells Using Hyperpolarized 13C NMR
Published on: July 8, 2025
Precise and accurate quantitative (13)C NMR with reduced experimental time.
Elsa Caytan1, Gérald S Remaud, Eve Tenailleau
1Nantes University, LAIEM-UMR-CNRS 6006, Faculty of Science and Technology, 2 rue de la Houssinière, BP 92208, F-44322 Nantes Cedex 3, France.
High-sensitivity (13)C NMR requires precise measurements. Using (13)C bi-labelled ethanol as a probe, researchers found that reduced repetition delay with relaxation reagents maintains spectral quality for accurate isotopomer analysis.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Isotope Analysis
Background:
- Quantitative (13)C NMR spectroscopy demands high sensitivity, accuracy, and precision for detecting subtle variations in (13)C isotopomer concentrations.
- Molecular probes are essential for assessing the performance of NMR techniques.
- (13)C bi-labelled ethanol offers a unique advantage due to its inherent structural relationship between spectral peak areas.
Purpose of the Study:
- To evaluate the suitability of (13)C bi-labelled ethanol as a molecular probe for assessing quantitative (13)C NMR spectroscopy.
- To determine if reduced repetition delays, facilitated by relaxation reagents, impact the quality performance of (13)C NMR.
- To confirm the reliability of isotopomer concentration measurements under optimized NMR conditions.
Main Methods:
- Utilized (13)C bi-labelled ethanol as a molecular probe in (13)C NMR spectroscopy.
- Leveraged the fixed ratio of signal areas in the (13)C NMR spectrum of the probe molecule.
- Investigated the effect of significantly reduced repetition delays in conjunction with relaxation reagents on spectral quality.
Main Results:
- The study demonstrated that the quality performance metrics required for quantitative (13)C NMR spectroscopy remain unaffected.
- A large reduction in repetition delay, achieved using relaxation reagents, did not compromise the accuracy or precision of the measurements.
- The inherent structural relationship of (13)C bi-labelled ethanol proved robust under these modified experimental conditions.
Conclusions:
- (13)C bi-labelled ethanol is a reliable molecular probe for assessing quantitative (13)C NMR spectroscopy.
- Optimizing experimental parameters, such as reducing repetition delay with relaxation reagents, can maintain high-quality spectral data.
- These findings support the accurate detection of small variations in (13)C isotopomer concentrations using (13)C NMR.
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