NEWS
Results for Aqueous Solutions
In this study, the IsoMist was used to precisely control the spray chamber conditions
during the analysis of various precious metal elements in solution to investigate the effect
of temperature on precious metal signal intensities and analytical accuracy. The elements
analysed included: gold Au; iridium Ir; palladium Pd; platinum Pt; rhodium Rh; and
ruthenium Ru. Figure 2 shows the average signal intensity n = 10 of various precious
metals at specified spray chamber temperatures using the IsoMist.
Figure 2: Graph of signal intensity versus spray chamber temperature for several precious metals.
In order to gauge the effect of temperature on the accuracy of the precious metal
measurements, a solution of platinum was analysed at a range of temperatures and
compared to the concentration determined gravimetrically. The results shown in Figure 3
show that, at higher spray chamber temperatures, the ICP determinations of the platinum
concentration are closer to the gravimetric or true value. Again this demonstrates that
the IsoMist enhances the sample introduction environment to help provide the conditions
necessary for accurate and reproducible platinum measurements.
Figure 3: Plot of average ICP measurement of the percentage of platinum in solution n = 10 versus temperature.
The error bars are 1σ.
GE NEWS
Website upgrade –
choice of language
Most of the Glass Expansion website is
conveniently available in English, French,
German, Italian, Spanish, Chinese,
Japanese and Russian. The non-English
pages have recently been updated so all
of the latest information is now available
in your choice of language. Navigation is
simple and you can switch languages at
any time using the language buttons at
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www.geicp.com Glass Expansion Newsletter | Issue 22 | page 2
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