As we can see in Figure 8, the Conikal nebulizer provides the
lowest cost, while the parallel path and “universal” DuraMist
nebulizer are the most expensive.
Figure 8. Comparison of nebulizer costs.
SeaSpray Conikal DuraMist
Slurry Parallel Path
Short-term analytical precision is one of the most critical figures of
merit for an ICP-OES. With short-term precision (%RSD) the lower
the figure, the better, as there is less variability in the analytical
signal. In Figure 9 the SeaSpray nebulizer shows the best short-term
precision of 0.26% RSD. Whereas, the parallel path V-groove
nebulizer gives the worst precision at 1.3% RSD. Due to the design of
the V-groove nebulizer, precision can be improved at higher sample
flow rates (1.5 to 2 mL/min). However, higher sample flow rates are
not desirable in many ICP applications due to plasma stability issues,
limited sample volumes or autosampler capacity (higher sample flow
rates require larger sample tubes, limiting the number of samples
that can be loaded on an autosampler).
All Glass Expansion UniFit concentric nebulizers also feature a Direct
Connection (DC) gas line (see Figure 7). Providing an inert metal-free,
instrument specific gas line. The reliable ratchet fitting to the
nebulizer ensures a leak-free gas connection, maintaining optimal
backpressure for consistent day-to-day nebulizer performance.
Figure 7. Direct Connect (DC) gas line
Gas Fitting with Ratchet Nebulizer Connector
for Avio 200/500
The SeaSpray nebulizer is glass concentric nebulizer that features
a uniquely engineered self-washing tip with smooth surfaces to
avoid build-up of salt crystals. It provides outstanding nebulization
efficiency and excellent tolerance up to 20% dissolved solids to give
the best detection limit performance of the nebulizers here, even in
The Conikal glass concentric nebulizer is a great value, high precision
nebulizer for routine analysis of aqueous and organic samples.
The HF resistant DuraMist concentric nebulizer is made of inert PEEK
materials. It is highly sensitive, with excellent short-term precision and
the highest tolerance to dissolved solids of any concentric nebulizer.
It is a great all-rounder and the choice for analysis of diverse sample
The Slurry glass concentric nebulizer is designed for analysis of
slurries, suspensions and wear metals. It provides the excellent
sensitivity and short-term precision of a glass concentric nebulizer
but is tolerant to undissolved particles of up to 150 um in diameter.
Parallel path nebulizers vary greatly in cost and performance.
The large bore capillary is designed to resist blockages, but results
in larger droplets and a wider drop size distribution, effecting both
efficiency and precision. Parallel path designs also typically suffer
from poorer reproducibility in performance from one nebulizer to the
Figure 9. Comparison of short-term analytical precision of 5 ppm Mn at 0.7 mL/min sample uptake
SeaSpray Conikal DuraMist
www.geicp.com Glass Expansion Newsletter | Issue 47 4