Low-pressure evaporation concentration prior to discrete nebulisation flame spectroscopic analysis

Abstract

The use of low-pressure evaporation in a vacuum desiccator for small-volume sample solutions is described. The procedure utilises hydrophobic plastic AutoAnalyzer cups without heating, which reduces deposition on the container walls, the final volume is assessed by weighing and therefore no dilution is required, no reagents are necessary and the system is closed to atmospheric contamination during the evaporation stage.