Semiquantitative spectrographic method for analysis of minerals, rocks, and ores
Analytical Chemistry
By: C. L. Waring and C. S. Annell
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Abstract
The quantity and complex nature of materials received for analysis in the spectrographic laboratories of the U. S. Geological Survey have emphasized the need for a spectrographic method to determine a maximum number of elements in a limited time with a reasonable degree of accuracy. The semiquantitative method described determines 68 elements in one arcing of a 10-mg. sample. The method has been used to complete 245,000 determinations during a 3-year period. Each determination is reported as a concentration range or bracket (0.001 to 0.01, 0.01 to 0.1%, etc.). A chemical check of 500 such determinations showed 92% in agreement; the remaining 8% agreed to within one bracket. The method requires a minimum of sample handling, thus reducing the chances of contamination, detects low concentrations of elements, and is rapid. Analyses have been completed on a wide variety of materials.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Semiquantitative spectrographic method for analysis of minerals, rocks, and ores |
| Series title | Analytical Chemistry |
| DOI | 10.1021/ac60080a008 |
| Volume | 25 |
| Issue | 8 |
| Year Published | 1953 |
| Language | English |
| Publisher | American Chemical Society |
| Description | 6 p. |
| First page | 1174 |
| Last page | 1179 |
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