Accession Number:

ADA029654

Title:

An Automatic Background-Correcting Spectrometer.

Descriptive Note:

Interim technical rept.,

Corporate Author:

INDIANA UNIV BLOOMINGTON DEPT OF CHEMISTRY

Report Date:

1975-08-25

Pagination or Media Count:

21.0

Abstract:

A new type of automatic, dual-channel, background correcting spectrometer has been developed. In the new spectrometer, one channel monitors the analyte line while the other views the background. The slit for the background channel, centered on the analyte, has a 1 mm width and is bisected by a thin wire which blocks out the radiation from the analyte line. Consequently, the background-channel photomultiplier tube receives radiation from both sides of the analyte line but not from the line itself. The signals from the two photomultiplier tubes are subtracted, the difference being the background-corrected value. Several determinations were performed showing the systems potential-calcium in a much higher concentration of potassium calcium in blood serum and barium in calcium solutions. These results were compared to those obtained by scanning across the analyte line and manually subtracting the background value. The two methods yielded very similar results. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE