Algorithm for Processing Sequences of Spectra for Scintillation Atomic Emission Spectral Analysis

Abstract

An «Extended 2014» algorithm for mathematical processing of the sequences of time-resolved atomic emission spectra is developed to extract weak scintillations (flashes) of analytical lines from the noise and, as a consequence, to lower the element detection limits. Sequences of spectra are recorded using a multielement solid-state radiation detector with powder excitation in arc sources of spectra (for example, using the spill-injection method of powder introduction). The algorithm is compared with spectra processing algorithms previously implemented in «Atom 3.3» program. The algorithm described in this paper is advantageous for fewer adjustments, more correct determination of the background mask saving more points of the background that are used in the background shape determination. This improves the results of processing sequences of spectra, including statistic parameters such as the standard deviation of the calibration curve and the variances of convergence and adequacy. The signal-to-noise ratio of spectral line scintillations is also improved. The algorithm is implemented in the «Atom» program.