A NEW NEBULIZER-HYDRIDE GENERATOR SYSTEM FOR SIMULTANEOUS MULTIELEMENT INDUCTIVELY COUPLED PLASMA-ATOMIC EMISSION-SPECTROMETRY

摘要

A nebulizer-hydride generator system has been developed in which large droplets of the acidified sample aerosol from a pneumatic nebulizer were trapped by the impact wall of a smoking-pipe shaped hydride generator, collected in its bowl, and reacted with NaBH4 or KBH4 solution pumped into the bowl to form volatile hydrides. The gas-aerosol mixture passed into an inductively coupled plasma for simultaneous determination of the hydrideforming and other elements. With this system the detection limits for the hydride-forming elements could be improved by more than 20 times compared to those obtained with the conventional nebulizing system, white those of the other elements remained practically unaffected. The sample consumption remained essentially the same for both systems. The new system could be easily switched to conventional nebulization.