The role of desolvation and hydrogen addition on the excitation features of the inductively coupled plasma
The influence of desolvation and hydrogen addition on the spectral intensities, ionization temperature and electron density distributions were determined at 7 and 13 mm above the load coil at an rf power setting of 1.2 kW in a 27.12 MHz ICP. An ultrasonic nebulizer and desolvation system were used to produce and control the droplet size by desolvation. The desolvation process increased ionization temperature and electron density up to the optimum desolvation temperature of 100°C above room temperature. Addition of hydrogen to about 4% in the carrier gas lead to a further increase in ionization temperature, electron density and spectral intensity at the optimum desolvation temperature. © 1988.