CHARACTERIZATION OF A NEW SINGLE-BORE HIGH-PRESSURE PNEUMATIC NEBULIZER FOR ATOMIC SPECTROMETRY .2. DISCRETE SAMPLE INTRODUCTION IN FLAME ATOMIC-ABSORPTION SPECTROMETRY

A study has been made of the analytical behaviour, with discrete sampl e introduction, of a new high-pressure pneumatic nebulizer as part of sample introduction systems in flame atomic absorption spectrometry. T he nebulizer possesses a single bore for the gas and liquid flows. In comparison to the standard Meinhard nebulizer and under identical cond itions, the new nebulizer exhibits a greater relative sensitivity (up to 4.5 times) that increases the lesser the gas flow and the greater t he liquid flow. Precision is similar with both nebulizers, the detecti on limits being lower for the pressure nebulizer. The memory effect is likewise of the same order of magnitude for both nebulizers. The pres sure nebulizer has also proven satisfactory when working with high sal t content or organic solutions.