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. Author manuscript; available in PMC: 2009 Oct 30.
Published in final edited form as: Anal Chem. 2008 Jun 6;80(13):4820–4824. doi: 10.1021/ac800751y

Figure 5.

Figure 5

Variation of OGE for 12C (top) and 14C (bottom) as 1 ml is injected into the CO2 free buffer gas flowing at 10 SCCM. As shown in the inset, the signals scale at low concentrations, but the 14C signal saturates at a much lower concentration than the 12C.