| Biological fractionation of Zn isotopes in aquatic invertebrates |
| |
| 作者姓名： | R. Douglas Evans David C. Lasenby |
| |
| 作者单位： | [1]Environmental and Resource Studies, Trent University, Peterborough, Canada [2]Biology Department, Trent University, Peterborough, Canada |
| |
| 摘 要： | Recent advances in analytical instrumentation have made it more feasible to measure isotope ratios of many elements. In particular, modem multicollector-inductively coupled plasma mass spectrometers can measure isotope ratios of many elements with extremely high precision. As a consequence, we can begin to explore biological fractionation in a systematic way and hence develop isotope ratio measurements as a tool to explore the environmental geochemistry of trace metals. In this presentation we will discuss the problems and potential of measuring isotope ratios of zinc in biological samples from systems with non-specific contamination. This will include such issues as the importance of matrix removal to the measurement of valid isotope ratios, mass bias correction and the availability of standard reference materials. Recent data on isotope ratios of Zn in the aquatic invertebrate Mysis relicta will be presented. These animals are of particular interest because they changed their feeding pattern from juveniles to adults. Thus they can be used to test the hypothesis that differences in the isotopic signature of food sources may determine receptor signatures. The data indicate that there are significant differences in signatures at the different life stages. However, the continual uptake and loss of metals over an organism＇s life span may also lead to fractionation.
|
| 关 键 词： | 锌 同位素 生物分馏 无脊椎动物 生物地球化学 |
Biological fractionation of Zn isotopes in aquatic invertebrates |
| |
| R. Douglas Evans David C. Lasenby.Biological fractionation of Zn isotopes in aquatic invertebrates[J].Chinese Journal of Geochemistry,2006,25(B08):203-203. |
| |
| Abstract: | |
| |
| Keywords: | zinc isotope ratio fractionation aquatic invertebrate |
| 本文献已被 维普 等数据库收录！ |
