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A dithizone method for the determination of lead in monazite

January 1, 1994

In determining lead in monazite [(Ce,La,Th)PO4]--to be used as the basis for geologic age measurements--it was necessary to eliminate interferences due to the presences of phosphates of thorium and the rare-earth metals.

The method, in which monazite samples are attacked with hot concentrated sulfuric acid, taken up with dilute nitric acid, lead extracted as the dithizonate and then determined spectrophotometrically at 520 mμ, was successfully applied to a series of monazite samples. Rapid determinations were made with good reproducibility.

Citation Information

Publication Year 1956
Title A dithizone method for the determination of lead in monazite
DOI 10.3133/tei630
Authors R. A. Powell, C. A. Kinser
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Trace Elements Investigations
Series Number 630
Index ID tei630
Record Source USGS Publications Warehouse
USGS Organization