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Isotopic Analyses via MC-ICPMS and HR-ICPMS

at the LAMONT DOHERTY EARTH OBSERVATORY - AMERICAN MUSEUM OF NATURAL HISTORY ICPMS LAB

 

 

Neptune
The Neptune Plus is equipped with 10 faraday cups and 5 multipliers. The multipliers are in the axial position, attached to the high and low faraday cups as well as two additional multipliers for measuring Pb isotopes. It has 7 10^-11 amplifiers with a maximum signal range of 50V and 3 10^-12 amplifiers witha maximum signal range of 5V.

The Neptune was installed in 2012 under the direction of Dr. Steve Goldstein. It is currently used primarily for Nd, Hf, Pb. The Neptune has also been utilized for U-Th-Pa, Sr, Li and B isotopic analyses. All these samples have been processed through the appropriate separatory columns prior to analysis. Laser ablation of zircons for Hf, and micas for Li and B have also been performed on our Neptune.

 

attom

The Attom is a magnetic sector high resolution ICPMS. It is used for isotopic analyses which have low abundances and therefore must be measured on multipliers rather than faraday cups. The multiplier has a intensity range of 10^0 to 5 x 10^6 cps (counts per second). It also has an attenuation mode that allows up to 10^9 cps measured for even larger isotopic ratio ranges.

The Attom was installed in November 2009, under the direction of Dr. Terry Plank. It has been used to measure Re isotopes.