Billion-fold enhancement in sensitivity of nuclear magnetic resonance spectroscopy for magnesium ions in solution

Alexander Gottberg, Monika Kinga Stachura, Magdalena Kowalska, Mark L Bissell, Vaida Arcisauskaité, Klaus Blaum, Alexander Helmke, Karl Johnston, Kim Kreim, Flemming Hofmann Larsen, Rainer Neugart, Gerda Neyens, Ronald F. Garcia Ruiz, Daniel Szunyogh, Peter Waaben Thulstrup, Deyan T. Yordanov, Lars Bo Stegeager Hemmingsen