I've just gotten an update from my collaborators. They're still polishing up their purification methods, and waiting for the mass spectrometer machine-time that will open up when other researchers take time off over Christmas.
So with luck we'll have a preliminary answer in a few weeks. Then we'll have to get busy generating the final data and writing our paper!
Geologists in the land of the Kangaroo
3 hours ago in History of Geology