OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy


  • Vol. 40, Iss. 3 — Mar. 1, 1986
  • pp: 357–363

A Modulated Sample Introduction System for Atomic Emission Spectrometry

A. W. Steele and G. M. Hieftje

Applied Spectroscopy, Vol. 40, Issue 3, pp. 357-363 (1986)

View Full Text Article

Acrobat PDF (663 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

  • Export Citation/Save Click for help


A modulated sample-introduction device for use in flame emission spectrometry has been constructed and evaluated. With this device, the flow of aerosol to the excitation source is modulated by the application, at a specific frequency, of a pressure pulse to the nebulizer chamber; the use of frequency-selective detection then permits efficient signal recovery. If source background remains at a constant level, it is not detected and the signal-to-background ratio (S/B) is consequently improved. Because the technique provides a decrease in the instrument 1/f and flame-background flicker noise, detection limits are improved. These features are especially prominent when the analyte line of interest is in a spectral region of high source background. Modulation frequencies of 8 to 20 Hz have been explored and have resulted in good depth of modulation (>99%) and signal-pulse separation. The construction and operation of the device will be described and its performance for several elements evaluated in terms of detection limits, S/B enhancement, and working curve linearity. Also, the extension of the technique to selective spectral-line modulation schemes and to inductively coupled plasma emission spectrometry will be considered.

A. W. Steele and G. M. Hieftje, "A Modulated Sample Introduction System for Atomic Emission Spectrometry," Appl. Spectrosc. 40, 357-363 (1986)

Sort:  Journal  |  Reset


References are not available for this paper.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited