Precise, small sample size determinations of lithium isotopic compositions of geological reference materials and modern seawater by MC-ICP-MS
Precise, small sample size determinations of lithium isotopic compositions of geological reference materials and modern seawater by MC-ICP-MS
复制标题
DOI：
10.1111/j.1751-908x.2004.tb01053.x
复制
发表时间：
2004-01-01
影响因子：
3.8
通讯作者：
Bouman, C
中科院分区：
文献类型：
--
作者：
Jeffcoate, AB;Elliott, T;Bouman, C
用多收集器电感耦合等离子体质谱(MC-ICPMS)测定了USGS BHVO-2、GSJ JB-2、JG-2、JA-1四种国际岩石标准物质和现代海水(地中海、太平洋和北大西洋)的锂同位素比值。这些天然样品的标准物质选择跨越了相当大的Li同位素比率范围，并涵盖了几个不同的基质，以便为未来的研究提供一个有用的基准。与以前的方法相比，我们的新分析技术实现了显著更高的精密度和重复性(±lt；+/-0.3ppm/10002s)，另外一个优点是需要非常低的样品质量，大约2纳克的锂。
The Li isotope ratios of four international rock reference materials, USGS BHVO-2, GSJ JB-2, JG-2, JA-1 and modern seawater (Mediterranean, Pacific and North Atlantic) were determined using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). These reference materials of natural samples were chosen to span a considerable range in Li isotope ratios and cover several different matrices in order to provide a useful benchmark for future studies. Our new analytical technique achieves significantly higher precision and reproducibility (< +/- 0.3parts per thousand 2s) than previous methods, with the additional advantage of requiring very low sample masses of ca. 2 ng of Li.