An integrated-intensity method for emission spectrographic computer analysis
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Abstract
An integrated-intensity method has been devised to improve the computer analysis of data by emission spectrography. The area of the intensity profile of a spectral line is approximated by a rectangle whose height is related to the intensity difference between the peak and background of the line and whose width is measured at a fixed transmittance below the apex of the line. The method is illustrated by the determination of strontium in the presence of greater than 10 percent calcium. The Sr 3380.711-A line, which is unaffected by calcium and which has a linear analytical curve extending from 100-3,000 ppm, has been used to determine strontium in 18 standard reference rocks covering a wide range of geologic materials. Both the accuracy and the precision of the determinations were well within the accepted range for a semiquantitative procedure.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | An integrated-intensity method for emission spectrographic computer analysis |
| Series title | Journal of Research of the U.S. Geological Survey |
| Volume | 3 |
| Issue | 2 |
| Year Published | 1975 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 5 p. |
| First page | 181 |
| Last page | 185 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
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