Author： Deutsch R. D. Hieftje G. M.
Publisher： Society for Applied Spectroscopy
ISSN： 0003-7028
Source： Applied Spectroscopy, Vol.39, Iss.1, 1985-01, pp. : 19-24
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Abstract
The noise from the emission signal of the microwave-induced nitrogen discharge at atmospheric pressure (MINDAP) has been analyzed. Wavelength-scan flicker-ratio, precision measurements, time-trace correlation and noise amplitude spectra were used to determine the individual components of the system noise. Noise spectra are reported with the use of a nebulizer sample introduction system for desolvated and undesolvated aerosol, for varying analyte concentration, and for background emission from nitrogen and water vapor. The analytical system appears to be flicker-noise-limited below about 1 Hz for all measurements made. Only 60 and 120 Hz peaks are detected in the frequency region extending to 700 Hz, and presumably arise from the microwave power supply
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