| Abstract: | A modified niobium thiocyanate spectrophotometric procedure relatively insensitive to titanium interference is presented. Elements such as tungsten, molybdenum, vanadium, and rhenium, which seriously interfere in the spectrophotometric determination of niobium, are separated by simple sodium hydroxide fusion and leach; iron and magnesium are used as carriers for the niobium. Tolerance limits are given for 28 elements in the spectrophotometric method. Specific application is made to the determination of niobium in the parts per million range in rocks. The granite G-1 contains 0.0022% niobium and the diabase W-1 0.00096% niobium. |
| Genre: | Conference Paper |
| ProdID: | 70010620 |
| Citation Author: | Grimaldi, F. S. |
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| Citation End Page: | 121 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Analytical Chemistry |
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| Citation Number Of Pages: | 3 |
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| Citation Search Results Text: | Determination of niobium in the parts per million range in rocks; 1960; Conference Paper; Analytical Chemistry; Grimaldi, F. S. |
| Citation Start Page: | 119 |
| Citation Volume: | 32 |
| Citation Year: | 1960 |
| Type: | citation/reference |
| Text: | Determination of niobium in the parts per million range in rocks; 1960; Conference Paper; Analytical Chemistry; Grimaldi, F. S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1960 00:00 -0600 |
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