NMRlab
  • Login & order NMR service now
  • NMR service
    Login & order NMR service now NMR service NMR chromatography service Why use our superior service Contact us The NMR team How to submit samples Use the instruments yourself Terms & conditions
  • (43Ca) Calcium NMR
    (43Ca) Calcium NMR Properties of 43Ca Safety note
  • NMR
    Go to home page What is NMR Techniques Apps Guides Contact us
  • עברית
  • HU NMR lab
  • Login & order NMR service now
  • NMR service
    Login & order NMR service now NMR service NMR chromatography service Why use our superior service Contact us The NMR team How to submit samples Use the instruments yourself Terms & conditions
  • (43Ca) Calcium NMR
  • Properties of 43Ca
  • Safety note
  • What is NMR
    What is NMR Uses of NMR Basis of NMR Chemical shift Spin-spin coupling
  • Techniques
    Techniques 1H NMR 2D NMR Relaxation Multinuclear Semi-solids Solid state
  • Apps
    Apps Solvent shifts NMR thermometer Reference frequency
  • Guides
    Guides Measuring a 1H spectrum on the old 500 Measuring a 1H spectrum Measuring other nuclei Measuring 2D NMR Measuring diffusion Measuring relaxation Measuring solid & semi-solid
  • Contact us
  • Terms & conditions
  • עברית

(43Ca) Calcium NMR

Use our NMR service that provides 43Ca NMR and many other NMR techniques.

43Calcium (43Ca) is a moderately sensitivity nucleus but with a very low natural abundance that yields moderately sharp lines (fig. 1) in symmetric environments over a small chemical shift range. 43Ca is a spin 7/2 nucleus and is therefore quadrupolar. As a result, the signal width increases with asymmetry of the environment. 43Ca NMR is mostly used in relaxation studies to determine binding to DNA, proteins, etc. Because of its extremely low sensitivity at natural abundance, it is usually isotopically enriched for these studies despite the cost. There is little information available about chemical shifts (fig. 2).

Fig. 1. 43Ca-NMR spectrum of CaCl2 (1M) in D2O

Calcium spectrum

Fig. 2. Chemical shift ranges for calcium NMR

Chemical shifts of calcium

Properties of 43Ca

(Click here for explanation)

PropertyValue
Spin7/2
Natural abundance0.135%
Chemical shift range70 ppm, from -35 to 35
Frequency ratio (Ξ)6.730029%
Reference compound0.1 M CaCl2 in D2O
Linewidth of reference0.5 Hz
T1 of reference1 s
Receptivity rel. to 1H at natural abundance8.68 × 10-6
Receptivity rel. to 1H when enriched6.42 × 10-3
Receptivity rel. to 13C at natural abundance0.051
Receptivity rel. to 13C when enriched37.8
Linewidth parameter2.3 fm4

Safety note

Some of the materials mentioned here are very dangerous. Ask a qualified chemist for advice before handling them. Qualified chemists should check the relevant safety literature before handling or giving advice about unfamiliar substances. NMR solvents are toxic and most are flammable. Specifically, calcium salts are non-toxic on account of their calcium under normal circumstances. However, their anions may be toxic.