Chemistry of Thorium - Quantitative Estimation of Thorium by Precipitation with Radioactive Pyrophosphate

Abstract

Rickes et al. ( 5) polarographic studies indicated a general pterin class reduction at approximately 0.8 volt in 0.1 M lithium borate (pH 9.12) buffer. Thus, in a study of folic acid of presumably high purity pterin contaminants should be considered as likely to interfere with polarographic assays. LITERATURE CITED

Measurement Techniques of Applied Radiochemistry

“…More effective is a thinbottomed vessel which can be placed on the window of a counter tube (100). Several types of dipping counter tubes (9, 10, 59,153) and tubes surrounded by hollow jackets (11,92,107,117,150) counters have a tubulation at the bottom for the solution and another at the top for controlling the flow of liquid by suction and pressure.…”

Spectrophotometric Determination of Thorium in Monazite Sands

“…The use of organic acids to precipitate thorium selectively has received wide attention (6, 10, 13- [45][46][47][48][49]51). Other precipitation methods investigated recently use selenious acid (2), iodic acid (45), potassium iodate (51), ammonia (3) at a controlled pH, and radioactive pyrophosphate (26) in which the activity of the excess pyrophosphate in the filtrate is measured. The use of mesityl oxide to extract thorium selectively (9, 22) has been suggested.…”