NEWS
The RSD for Ar 404, Zn 206, and Ba 455 lines are monitored
to measure signal stability, with the lowest RSD being the most
stable. The stability data varies from wavelength to wavelength.
However, when averaging the stability for all three wavelengths
together, the DuraMist offers the best stability.
In order to examine the TDS capability for each inert nebulizer a
stress test was conducted. The conditions described below are
not utilized during normal operation, where a rinse would typically
be used after each sample was measured and the sample is
typically pumped rather than naturally aspirated. So this is a worst
case experiment designed to show the effects of high TDS quickly
and to compare one nebulizer with another.
Figure 2: Comparison of precision data.
Figure 3: Comparison of measurement sensitivity to the SeaSpray.
Figure 4: Comparison of measurement sensitivity to the DuraMist.
Abbreviation Test Diagnostic
Mg-Mg Mg280(II)/Mg285(I) Robustness
Cr-Cr Cr267(II)/Cr357(I) Atomization/ionization
Zn-Ba Zn206(II)/Ba455(II) Excitation
Mg Mg285 (I) RSD Nebulizer efficiency
Ar Ar404 (I) RSD Stability
Zn Zn206 (II) RSD Stability
Ba Ba455 (II) RSD Stability
Table 4: ICP figures of merit1
Figure 5: ICP figures of merit
www.geicp.com Glass Expansion Newsletter | Issue 26 | page 3