Detector Technologies for Multi-Collection

NIST SRM 915a CaC03 isotopic reference material. The data are in good agreement with mass fractionation and there is no evidence of spectral interferences from isobaric nuclides, polyatomic ions, and/or doubly chained ions affecting the results. The variability is the result of the drift in the extent of instrumental mass discrimination exhibited by the MC-ICP-MS instrument used. Reproduced from [14], 

Faraday cup detection is the most robust, linear, and accurate technology for the measurement of ion currents. Thin, deep buckets are precision-machined from 

O Olivine (Kilbourne Hole) HUh OPX (Kilbourne Hole) dH CPX (Kilbourne Hole) V PCC-1 

Inner Solar System Bulk Silicate Earth Av. Chondrites Av. Pallasites Av. Mars Av. Moon 

Secondary electron multipliers are bulky devices and cannot be placed adjacent to each other in an MC array to allow high-sensitivity ion current detection of neighboring masses, for example, Pb, Pb, and Pb. In this case, miniaturized conversion dynodes (channeltrons) that are identical in size with the standard Faraday cups can be inserted directly in the collector array. In this way, one could design an MC system that incorporates a channeltron for the measurement of a Faraday cup for the measurement of ° Pb, and three additional channeltrons for ° Pb, Pb, and Pb. 

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