I am looking for an analytical method which can be used for Uranium and Thorium estimations in acid medium. If any one has nay information on the above, please let me know.

These determinations can be easily completed using Voltammetry techniques. If you go to metrohm.com and look at instrumentation for 757/813 or 746/695 applications, you find thorium and Uranium applications to ppt detection limits .... cost of standalone system £10,000 or for an automated system ...£35,000
Voltammetry is used for determination of Heavy metals in sea water by the Environmental agencies ....
e-mail me back if you have any questions ....
regrads Ed Farmer

Uranium and Thorium can be determined by Chelation Ion Chromatography. This method is described in Dionex AN79, which is freely available from Dionex. These compounds can also be determined by IC-ICP/MS as described in Barrero Moreno, J. M., Betti, M., and Garcia Alonso, J. I. (1997) J. of Anal. Atomic Spectrometry 12, 355-361.“Determination of Neptunium and Plutonium in the Presence of High Concentrations of Uranium by Ion Chromatography-Inductively Coupled Plasma Mass Spectrometry” and Röllin, S. and Eklund, U-B. (2000) J. of Chromatogr. A 884, 131-141. “Determination of U(IV) and U(VI) by Ion Chromatography – Inductively Coupled Plasma Mass Spectrometry and its Application to Kinetic Studies.”

Mr. Farmer,

I read with interest your latest posting. Your rocket analogy is interesting. I am certainly not trying to intimidate you but rather to encourage you to follow normal common sense practices appropriate for this forum. Apparently my previous posting was too oblique for you. Let me succinctly restate the issues:

1). Please read the question and answer the question being posed. While it is appropriate to add additional commentary on other aspects not part of the original question, your answer should still be formulated in the context of the original question. Although you indicate that you accidentally posted an answer unrelated to the question, the majority of your postings have this characteristic! Perhaps you should try a little harder.

2). This forum should not be used as a basis for a sales pitch. It is inappropriate to incorporate information such as: model numbers of instrumentation (unless this is somehow of critical relevance to the discussion), prices, commentary on the "inexpensive" nature of the equipment, etc. The intent of this forum is to freely and openly discussed chromatography questions. This forum is not intended to be used as a means of free advertising! I doubt the readers of this forum will hold Metrohm in a positive light if you continue this egregious practice.

Chris Pohl