Improvements in the chemical generation of chlorine and bromine, and their respective hydrides as a means of sample introduction into an atmospheric pressure helium microwave-induced plasma

Chlorine and bromine, and their respective hydrides have been generated chemically from aqueous solution with a variety of reagents. The emission from the analytes was monitored at the following spectral lines: C1 II 479.455 nm and Br II 470.485 nm. Detection limits for the Cl2, HCl, Br2 and HBr generations were 0.6 ng of Cl, 0.3 ng of Cl, 0.09 ng of Br and 1.2 ng of Br, respectively, for aqueous solutions.