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Issue 1, 2013
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Low-blank chemistry for Zn stable isotope ratio determination using extraction chromatographic resin and double spike-multiple collector-ICP-MS

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Abstract

A new low-blank Zn separation method employing an extraction chromatographic resin using Aliquat 336 (commercially available as TEVA resin) has been developed for Zn isotope composition determination by double spike-multiple collector-ICP-MS. The silicate sample solution containing 0.1 μg Zn in 0.5 mol L−1 HBr containing 0.15% ascorbic acid (AA) is passed through a 1 mL column with 0.33 mL TEVA resin. While Zn is absorbed, major elements are eluted with 0.5 mol L−1 HBr with AA. Afterwards, Zn was recovered with 2 mol L−1 HNO3. Recovery yield using silicate samples was 96.7 ± 6.8% (n = 10) and total blank was 0.05 ng (n = 6). The blank level is from 1/300 to 1/20 of previous studies, meaning 0.1 μg of Zn is sufficient for analysis. The 67Zn–70Zn double spike method was used in MC-ICP-MS. δ66Zn of three USGS standard silicate reference materials (BHVO-1, AGV-1 and PCC-1) and seven GSJ silicate reference materials (JB-1, -2, -3, JA-1, -2, -3 and JP-1) were determined. Reproducibility of δ66Zn of the total silicates was 0.19‰ (2SD). δ66Zn of three carbonaceous chondrites (Orgueil, Murchison and Allende) were also determined and compared with those of references.

Graphical abstract: Low-blank chemistry for Zn stable isotope ratio determination using extraction chromatographic resin and double spike-multiple collector-ICP-MS

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Article information


Submitted
28 Sep 2012
Accepted
31 Oct 2012
First published
15 Nov 2012

J. Anal. At. Spectrom., 2013,28, 127-133
Article type
Paper

Low-blank chemistry for Zn stable isotope ratio determination using extraction chromatographic resin and double spike-multiple collector-ICP-MS

A. Makishima and E. Nakamura, J. Anal. At. Spectrom., 2013, 28, 127
DOI: 10.1039/C2JA30271C

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