Free intracellular magnesium concentration in ferret ventricular muscle measured with ion selective micro-electrodes

Q J Exp Physiol. 1986 Jul;71(3):467-73. doi: 10.1113/expphysiol.1986.sp003005.


The free Mg concentration ([Mg]i) was measured in ferret ventricular muscle using single-barrelled Mg-sensitive micro-electrodes. The electrodes were calibrated in solutions containing the [K]i and [Na]i measured in this tissue. In thirteen measurements from seven experiments conforming to strict criteria for calibration and penetration the estimated mean [Mg]i was 0.4 mmol/l. This is to be regarded as an upper limit since it was estimated by linear extrapolation of the calibration curve.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Ferrets / metabolism
  • Magnesium / analysis*
  • Membrane Potentials
  • Microelectrodes
  • Myocardium / analysis*


  • Magnesium