Anion Exchange Separations in Hydrobromic Acid-Organic Solvent Media

Solution and laser ablationMC-ICP-MS lead isotope analysis of gold

“…Lead can be separated from a range of geological materials using AG1-X8 (Bio-Rad), Pb.SpecÔ (Eichrom) and Sr.SpecÔ (Eichrom) ion exchange resins and a range of acid media. [13][14][15][16][17][18][19] These techniques are, however, unable to successfully isolate high yields of lead from a gold and silver rich matrix using minimal quantities of reagents. For example, classic HBr methods [13][14][15][16] can not be employed due to the formation of a Au precipitate throughout the column length and reservoir, whilst large volumes of reagents are required to separate Pb from Au if samples are loaded on Sr.SpecÔ resin.…”

“…[13][14][15][16][17][18][19] These techniques are, however, unable to successfully isolate high yields of lead from a gold and silver rich matrix using minimal quantities of reagents. For example, classic HBr methods [13][14][15][16] can not be employed due to the formation of a Au precipitate throughout the column length and reservoir, whilst large volumes of reagents are required to separate Pb from Au if samples are loaded on Sr.SpecÔ resin. Consequently a twostage chromatographic methodology, which includes the removal of silver as a chloride precipitate, was developed.…”

High-precision cadmium stable isotope measurements by double spike thermal ionisation mass spectrometry

“…Other relevant partition coefficients can be found elsewhere. [17][18][19] The ''pure'' Cd fraction was dried down and passed a second time through exactly the same chemical protocol to ensure complete purification. Prior to the first anion exchange separation, iron was removed from the sample by solvent extraction into MIBK (methyl isobutyl ketone, a.k.a.…”

Role of crustal assimilation and basement compositions in the petrogenesis of differentiated intraplate volcanic rocks: a case study from the Siebengebirge Volcanic Field, Germany

“…Chemical separation of Sr, Nd, and Hf follows the procedures outlined in Pin and Zalduegui (1997) and Münker et al (2001). Lead was separated from leached rock chips following the procedure reported by Korkisch and Hazan (1965 …”