| 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. |
| Genre: | Article |
| ProdID: | 70011071 |
| Citation Author: | Waring, C. L.; Annell, C. S. |
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| Citation End Page: | 1179 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Analytical Chemistry |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Semiquantitative Spectrographic Method for Analysis of Minerals, Rocks, and Ores; 1953; Article; Journal; Analytical Chemistry; Waring, C. L.; Annell, C. S. |
| Citation Start Page: | 1174 |
| Citation Volume: | 25 |
| Citation Year: | 1953 |
| Type: | citation/reference |
| Text: | Semiquantitative Spectrographic Method for Analysis of Minerals, Rocks, and Ores; 1953; Article; Journal; Analytical Chemistry; Waring, C. L.; Annell, C. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 1953 00:00 -0600 |
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