Determination of niobium in the parts per million range in rocks
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.
Citation Information
Publication Year | 1960 |
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Title | Determination of niobium in the parts per million range in rocks |
DOI | 10.1021/ac60157a035 |
Authors | F. S. Grimaldi |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Analytical Chemistry |
Index ID | 70010620 |
Record Source | USGS Publications Warehouse |