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Fig. 2 | Geochemical Transactions

Fig. 2

From: A synthetic standard for the analysis of carbon isotopes of carbon in silicates, and the observation of a significant water-associated matrix effect

Fig. 2

Observed matrix effect during ion microprobe carbon isotopic analyses between a hydrated material (the 526N sample) and the PPRG #215-1 Precambrian chert shown as a function of the total intensity of the pre-sputter. The larger diamonds had an additional 20 s pre-sputter using a 2 nA beam. Grey diamonds using an analysis primary beam of 0.4 nA, while the black diamonds are cases were the analysis primary ion beam was ~1 nA. The results suggest the stronger additional pre-sputter (at 2 nA) and a more intense analysis primary ion beam (at 1 nA) both reduce the observed matrix effect

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Geochemical Transactions

ISSN: 1467-4866

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