Electrothermal vaporization and ultrasonic nebulization for the determination of aqueous sulfur using a kilowatt-plus helium microwave-induced plasma

1992 ◽  
Vol 7 (8) ◽  
pp. 1253 ◽  
Author(s):  
Jorge Alvarado ◽  
Mingin Wu ◽  
Jon W. Carnahan
Keyword(s):  
Electrothermal Vaporization ◽  
Ultrasonic Nebulization ◽  
Microwave Induced Plasma

Analytical Feasibility of Graphite Rod Vaporization-Helium Microwave-Induced Plasma (GRV/He-MIP) for Some Nonmetal Determinations

1993 ◽  
Vol 47 (3) ◽  
pp. 366-374 ◽  
Author(s):  
M. M. Abdillahi
Keyword(s):  
Ammonium Nitrogen ◽  
Sample Introduction ◽  
Aqueous Sample ◽  
Electrothermal Vaporization ◽  
Microwave Induced Plasma ◽  
The Common ◽  
Anions And Cations ◽  
Significant Interference ◽  
Graphite Rod

Trace level quantities of some nonmetallic elements are determined by coupling graphite rod electrothermal vaporization with a helium microwave-induced plasma. Microliter liquid samples of chlorides, bromides, iodides, sulfides, and ammonium nitrogen have been introduced into a grooved graphite rod, where they were dried, ashed, and vaporized into the plasma. The analytical performance of the GRV/He-MIP was found to be an excellent excitation source for dry analyte vapors. The graphite rod vaporization device is well suited for sample introduction for a lowpower microwave-induced plasma. Analytical calibration curves were obtained that have linearities between 2.5 to 5 orders of magnitude. Detection limits of the technique for 10- μL aqueous sample solutions are reported in the lower nanogram region. The common anions and cations did not show significant interference effects on the determination of traces of these nonmetals.

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