Indirect Complexometric Titration of Beryllium with Ethylenediaminetetraacetic Acid

Abstract

When Luteo salt was added to beryllium carbonate complex solution, the precipitate [Co(NH3)6] [(H2O)2Be2(CO3)2(OH)3]·3H2O was obtained. In this experiment, the indirect determination of beryllium was tried by the titration of the cobalt content in the precipitate with EDTA. The following procedures were examined mainly; the formation of the precipitate II, the decomposition of the precipitate and titration of cobalt in the presence of beryllium. In the optimum conditions, 0.70 to 3.50 mg. of beryllium were determined quantitatively. This method could be applied to separation and determination of beryllium from iron(III), aluminum and magnesium by using EDTA as a masking agent.

9Be and 31P NMR analyses on the influence of imino groups on Be2+ complex stabilities of a series of cyclo‐μ‐imido triphosphate anions

“…A stock solution of BeCl 2 was prepared by dissolving analytical grade BeCl 2 purchased from Central European Renewable Acquisition Corp. (Milwaukee, USA) by a 0.10 mol l −1 HCl solution in order to prevent hydrolysis of Be 2+ ion. The concentration of the BeCl 2 stock solution was determinated by ethylenediaminetetraacetic acid complexometry . Other reagents used in this work without further purification were of analytical grade.…”

“…The concentration of the BeCl 2 stock solution was determinated by ethylenediaminetetraacetic acid complexometry. [73] Other reagents used in this work without further purification were of analytical grade. 9 Be and 31 P NMR measurements All NMR titrations were carried out by adding a portion of Na 3 cP 3 O 9Àn (NH) n (n = 1, 2) solution of 0.2 mol l À1 to a 3 ml portion of BeCl 2 solution contained in an NMR sample tube with a microsyringe.…”

Anion Exchange Separation of Beryllium

“…Al( III) (10), Ga(III) (10), In(III) (10), Sc(III) (10), Y(III) (10), La(III) (10), Sn(II) (10), Pb(II) (1), Ti(IV)(5), Zr(IV)(5), and Th(IV) (10). Bi(III)( 10), V(V-IV) (10), Cr(III) (10), Mo(VI) (10), and UO2(II) (10). carried out.…”

“…The adsorption of beryllium on Dowex 1 has also been investigated by Misumi and Taketatsu (10) and Nelson and Kraus (11) in carbonate and citrate solutions, respectively. In such media, however, separation of beryllium from other elements such as other group II elements-uranium, etc.-is relatively poor.…”