HYDRAULIC HIGH-PRESSURE NEBULIZATION SAMPLE INTRODUCTION FOR DIRECT ANALYSIS OR ONLINE MATRIX SEPARATION AND TRACE PRECONCENTRATION IN FLAME AAS - TRACE ANALYSIS IN A TUNGSTEN MATRIX

Only by replacement of the pneumatic nebulization by the new hydraulic high-pressure nebulization (HHPN) in flame AAS 2 to 10 times higher power of detection (depending on the element) can be achieved for the direct trace determination in a saturated tungstate solution. HHP-nebulization leads in general to higher sensitivity and additionally to lower matrix interferences. The HHPN-sample introduction system offers also facilities for a quick on-line matrix separation/trace preconcentration. Detection limits of 0.1 to 1-mu-g/g were achieved for a tungsten matrix (depending on the element).