Rapid determination of thorium in ores

Extraction and Spectrophotometric Determination of Thorium with 8-Quinolinol.

“…Application to Analysis of Monazite Sand. On the basis of the foregoing studies and accepted procedures (1,4,15) the following method was used for the determination of thorium oxide in monazite sand.…”

“…Although this decrease in acid tended to increase the contamination of the precipitate, the impurities were still within the range that could be tolerated. The addition of oxalic acid prevented the precipitation of Zr, Ti, Bi, and Ce as iodates (15). Sodium iodate was used to avoid the possible precipitation of potassium perchlorate.…”

Spectrographic Determination of Thorium in Uranium Ore

“…Anion exchange from 8-17 HN03 and elution with [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] gave poor recoveries after lanthanum fluoride precipitation.…”

Non-Russian References

“…Collected Papers on Methods of Analysis for Uranium and Thorium.Geological Survey bulletin, 1006, Compiled by GRIMALDI, F. S., MAY, I., FLETCHER, Μ. H. and TITCOMB, J., Washington, United States Government Printing Office(1954). CHAMBERLAIN, O., FAR WELL, G., JUNGERMAN, J., SEGRÉ, E. and WIEGAND, C.,Phys.…”