| Abstract: | A method has been developed for separating the Cr dissolved in natural water from matrix elements and determination of its stable isotope ratios using solid-source thermal-ionization mass spectrometry (TIMS). The separation method takes advantage of the existence of the oxidized form of Cr as an oxyanion to separate it from interfering cations using anion-exchange chromatography, and of the reduced form of Cr as a positively charged ion to separate it from interfering anions such as sulfate. Subsequent processing of the separated sample eliminates residual organic material for application to a solid source filament. Ratios for 53Cr/52Cr for National Institute of Standards and Technology Standard Reference Material 979 can be measured using the silica gel-boric acid technique with a filament-to-filament standard deviation in the mean 53Cr/52Cr ratio for 50 replicates of 0.00005 or less. (C) 2000 Elsevier Science B.V. All rights reserved. |
| Genre: | Article |
| ProdID: | 70022631 |
| Citation Author: | Ball, J. W.; Bassett, R. L. |
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| Citation End Page: | 134 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Chemical Geology |
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| Citation Number Of Pages: | 12 |
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| Citation Search Results Text: | Ion exchange separation of chromium from natural water matrix for stable isotope mass spectrometric analysis; 2000; Article; Journal; Chemical Geology; Ball, J. W.; Bassett, R. L. |
| Citation Start Page: | 123 |
| Citation Volume: | 168 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Ion exchange separation of chromium from natural water matrix for stable isotope mass spectrometric analysis; 2000; Article; Journal; Chemical Geology; Ball, J. W.; Bassett, R. L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/S0009-2541(00)00189-3 |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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