Publication Date:
2022-05-26
Description:
This program processes data from a Spectraspan IIB spectrometer retrofitted
with a Spectrajet III plasma excitation source (Spectrametrics, Inc .,
Andover, MA). The spectrometer is operated manually and can determine only
one element at a time. Accordingly, the program treats data for each element
individually.
Two of the spectrometer's performance characteristics tend to change
gradually during normal operation: average blank count and analytical
sensitivity. The program compensates for these variations. For the program
to process data from the spectrometer, a reagent blank and a high standard
(in this order) should be aspirated first; then the high standard and blank
(in this order) should be run again after every six or fewer samples .
The program, moreover, causes all data to be converted to logarithmic
form before being used in computation. This makes possible the calculation
of statistically valid confidence limits about predicted analyte concentrations.
The program consists of a main section, DCPEOES, and three external
sub-routines: BASELINE, SENSITIV, and XLNSQFT. BASELINE compensates for
any change in the average blank count, and SENSITIV corrects for any
variation in analytical sensitivity. XLNSQFT governs all correlation and
prediction functions and has two interchangeable versions: one for first-order;
the other for second-order, correlation.
Description:
Prepared for the United States Department of Energy under
Contract DE A102-81EV10694 and for the National Science
Foundation under Grant OCE 81-19056.
Keywords:
Plasma spectroscopy
;
Computer programs
;
Calibration
;
Spectrometer
Repository Name:
Woods Hole Open Access Server
Type:
Technical Report
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