Low-Power Surfatron Source for the Atomic-Emission-Spectrometric Detection of Nonmetals in Aqueous Solution

摘要

Emission spectra in the UV visible and near infrared (NIR) spectral regions are presented for several nonmetals introduced as aqueous solutions by a glass frit nebulizer. Detectability improves dramatically for some nonmetals by using a desolvation system to reduce the amount of water vapor entering the plasma. Detection limits for P, I, S, CI, Br, and C are in the low to sub-ppm range. Good precision (RSD <5%) and a dynamic range of 2-3 decades were observed for I and P. Easily ionizable elements such as K, Na, and Li can enhance nonmetal emission by as much as 30%. Keywords: Phosphorous, Iodine, Sulfur, Chlorine, Bromine, Carbon, Potassium, Sodium, Lithium, Microwave plasma, Surface wave plasma, Multielement analysis, Nonmetal determination, Reprints.