Methods for detecting rare earth minerals

Details Methods for detecting rare earth minerals Methods for detecting rare earth minerals

1989-02-10

1989-10-24

Hill, Jr., Robert J.

Chemistry: analytical and immunological testing

Metal or metal containing

Zn, cd, hg, sc, y, or actinides, or lanthanides

250302, 2504611, 436 51, 436172, G01N 3320

Patent

active

048762067

ABSTRACT:
This invention relates to methods for quickly and accurately detecting the presence of rare earth minerals which can be performed in the field. An ore sample to be tested for the presence of rare earth minerals is contacted with both a basic reagent, preferably containing an alkali metal, and with a halide acid such as hydrochloric acid. Once the treated ore sample is dry, it is examined under a shortwave ultraviolet light for fluorescence of a red-orange color. If rare earth minerals are present, fluorescence of a red-orange color will occur. If no rare earth minerals are present, no red-orange fluorescence is observed. The sensitivity of the disclosed methods to rare earth minerals may be varied by altering the basic reagent to permit the user to "zero in" on the most concentrated source of rare earth minerals.

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