Abstract
Hydraulic high-pressure nebulization (HHPN) is a new aerosol generation technique in atomic spectrometry. Owing to the high aerosol yield of about 50%, the application of HHPN in ICP spectrometry requires a desolvation unit. The constructed unit consists of a heated tube and a two-stage condenser (liquid cooler, Peltier module cooler). The liquid cooled Peltier module offers variability of condensation temperature between +15 and −40°C. This temperature range is also sufficient for solvent-plasma load control of highly volatile organic solvents. The desolvation unit offers condensation efficiency of 97% for aqueous samples (−5°C) and 94% for methanol (−25°C). The analyte mass transport efficiency amounts to about 24%. In inductively coupled plasma atomic emission spectrometry (ICP-AES), significant improvements in sensitivity and detection limits of about one order of magnitude were obtained for most of the elements under investigation. Using an HPLC pump (100–400 bar), the additional facilities of an on-line high-performance flow system is offered (high-performance flow atomic spectrometry).
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