STUDIES ON SIGNAL-TO-NOISE RATIO AND ANAL YTICAL DYNAMIC-RANGE IN ECHELE CCD ICP-AES/

This paper reports the experimental study on the ECHELE/CCD ICPAES. Th e results show that the S/N ratio enhancement is particularly importan t in the signal process due to the low sensitivity of CCD in UV range. The effect of CCD noise pattern of dark current and of sensitivity, a nd their correction methods are described, The analytical dynamic rang e of CCD has been expanded to the six orders of magnitude, by means of multiple-time integration or multiple-line integration.