Measurements of mass-dependent Te isotopic variation by hydride generation MC-ICP-MS

Abstract

A new method for precise measurements of tellurium stable isotope variations by hydride generation MC-ICP-MS is presented, including a revised sample preparation scheme.

Atomic spectrometry update – a review of advances in environmental analysis

“…Interest in the measurement of isotope ratios has led to the development and application of new MC-ICP-MS isotope methods for the measurement of the following: 11 B/ 10 B in irrigation water and bell pepper plants to study B fractionation during uptake and translocation; 153 114 Cd/ 110 Cd in rock, soil and manganese nodule CRMs; 102 208 Pb/ 206 Pb and 207 Pb/ 206 Pb in soil and wine as a potential geographic tracer for authentication of Lambrusco PDO wines from Modena; 154 130 Te/ 126 Te in mine tailings, soil and sediment by HG-MC-ICP-MS as indicators of Te mobility and environmental redox conditions; 155 and 234 U/ 238 U and 235 U/ 238 U in soils from Odisha, India and Fukushima, Japan. 156 Although it was reported 157 that MC-ICP-MS was not necessary for measurement of 67 Zn/ 66 Zn in soil-fertiliser-plant systems as the precision obtained with standard quadrupole ICP-MS was adequate, this study featured the addition of a nutrient solution containing highly enriched 67 Zn and so did not concern the measurement of natural isotopic variations.…”

“…Hydride generation MC-ICP-MS can be a valuable technique for isotope analysis because of the potential to isolate the element of interest from interfering species. A method to measure Te isotopes by HG-MC-ICP-MS utilised 155 a 120 Te– 124 Te double spike for mass bias corrections. Sensitivities were similar to those achieved with a desolvating nebuliser, and δ 130 Te/ 126 Te precisions of 0.09‰ (2SD) were obtained for <8.75 ng of natural Te.…”

Atomic spectrometry update: review of advances in atomic spectrometry and related techniques

“…Wasserman and Johnson 168 also used a HG system in conjunction with an ICP-MCMS to assess Te isotopic variation. This study utilised a 120 Te– 124 Te double spike with <10 ng Te.…”

A new double spike method for the determination of mass-dependent Te isotope compositions of meteorites and terrestrial materials by MC-ICP-MS

“…They found signicant massdependent Te isotope fractionations in low-temperature terrestrial and marine environments, which they tentatively attributed to redox reactions or adsorption. 8,9 Fehr et al 3 found little to no within-group variations in the Te isotope compositions of carbonaceous chondrites. Instead, they identied coupled between-group differences of massdependent Te isotope compositions and concentrations, which they ascribed to variable mixing between a matrix rich component and chondrules or chondrule pre-cursors.…”