OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 22, Iss. 2 — Mar. 1, 1968
  • pp: 109–114

Flame Photometer Specialized for Cesium

T. R. Folsom, C. Sreekumaran, W. E. Weitz, and D. A. Tennant

Applied Spectroscopy, Vol. 22, Issue 2, pp. 109-114 (1968)


View Full Text Article

Acrobat PDF (900 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

A new photometer system is described that allows very small traces of an element, such as cesium, to be determined quantitatively with greater precision than previously possible with flame-emission spectra. For example, with the new system it is possible to replicate measurements of the cesium in quantities that are normally present in one liter of sea water (about 0.3 μg) with standard error less than two percent. Dilute cesium standard solutions can be compared significantly within a few parts per billion. This, apparently, has not been reported for any previous flame photometer. The system consists of two photomultiplier tubes observing a flame simultaneously, from the same aspect, but each having a different optical filter interposed. Use is made of a beam splitter and two interference filters, one filter passing only a narrow band centered at the 8521.1-Å line of cesium, the other filter passing a nearby band not containing much of this emission but rather passing a sample of the background of the flame that contributes much of the total statistical fluctuation. Signals from these two phototubes are compared by suitable differential circuits, and are continuously recorded. A specialized automatic sample-changing system was developed to provide for precise timing of the burning of the sample and the standard solutions and to carry out aspirator washings immediately following the burning of each sample. Finally, means are provided for continuously monitoring the aspiration rate by recording the brightness of the background (off-peak) signal independently.

Citation
T. R. Folsom, C. Sreekumaran, W. E. Weitz, and D. A. Tennant, "Flame Photometer Specialized for Cesium," Appl. Spectrosc. 22, 109-114 (1968)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-22-2-109

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited