DETERMINATION OF SILICATE BY HOLLOW-CATHODE GLOW DISCHARGE-ATOMIC EMISSION-SPECTROMETRY WITH HYDRIDE GENERATION TECHNIQUE

Hollow cathode glow discharge atomic emission spectrometry has been ap plied to the determination of silicon coupled with a novel gaseous hyd ride generation technique, involving drying of an aqueous solution of silicate (sample) and mixing with powdered LiAlH4. Sample introduction into the glow discharge chamber was performed via a pinhole at the ce nter of the cathode which was connected to the hydride generator. The detection limit for silicon was 6 mu g at 288.1 nm and 30 mu g at 251. 6 nm.