Relaxation reagent

{
  "id": "MLC-T-CHM-010173",
  "term": "Relaxation reagent",
  "field": "Chemistry",
  "definition": "A paramagnetic substance added to a sample in nuclear magnetic resonance (NMR) spectroscopy to reduce the spin-lattice (T1) and spin-spin (T2) relaxation times of nuclei. These reagents accelerate the return of excited nuclei to their equilibrium state, which can shorten experiment times and improve signal-to-noise ratios. Gadolinium complexes are common examples used in medical imaging.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "nuclear magnetic resonance spectroscopy",
    "spin-lattice relaxation"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 702 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/relaxation-reagent/"
}