U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads

Details U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005gecoa..69.1841b&link_type=abstract

Geochimica et Cosmochimica Acta, Volume 69, Issue 7, p. 1841-1846.

Other

Scientific paper

We present a new analytical method for U-series isotopes using the SHRIMP RG (Sensitive High mass Resolution Ion MicroProbe) mass spectrometer that utilizes the preconcentration of the U-series isotopes from a sample onto a single ion-exchange bead. Ion-microprobe mass spectrometry is capable of producing Th ionization efficiencies in excess of 2%. Analytical precision is typically better than alpha spectroscopy, but not as good as thermal ionization mass spectroscopy (TIMS) and inductively coupled plasma multicollector mass spectrometry (ICP-MS). Like TIMS and ICP-MS the method allows analysis of small samples sizes, but also adds the advantage of rapidity of analysis. A major advantage of ion-microprobe analysis is that U and Th isotopes are analyzed in the same bead, simplifying the process of chemical separation. Analytical time on the instrument is ˜60 min per sample, and a single instrument-loading can accommodate 15 20 samples to be analyzed in a 24-h day. An additional advantage is that the method allows multiple reanalyses of the same bead and that samples can be archived for reanalysis at a later time. Because the ion beam excavates a pit only a few μm deep, the mount can later be repolished and reanalyzed numerous times. The method described of preconcentrating a low concentration sample onto a small conductive substrate to allow ion-microprobe mass spectrometry is potentially applicable to many other systems.

Affiliated with

Also associated with

No associations

Rating

U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-971252