Correlation and characterisation of individual glass shards from tephra deposits using trace element laser ablation ICP‐MS analyses: current status and future potential
Correlation and characterisation of individual glass shards from tephra deposits using trace element laser ablation ICP‐MS analyses: current status and future potential
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DOI：
10.1002/jqs.1092
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发表时间：
2007-10
影响因子：
2.3
通讯作者：
N. Pearce;J. Denton;W. Perkins;J. Westgate;B. Alloway
中科院分区：
文献类型：
--
作者：
N. Pearce;J. Denton;W. Perkins;J. Westgate;B. Alloway
激光烧蚀电感耦合等离子体质谱（LA-ICP-MS）是一种高空间分辨率的分析方法，已被应用于麻黄的分析。使用现有的仪器，可以从火山灰沉积物中分离出的小至1040 µm的单个玻璃碎片中确定大约30种微量元素。由于在使用266 nm激光的烧蚀过程期间的元素分馏，需要相对复杂的校准策略。尽管如此，这种策略给出了准确的分析（通常在±5%内），并且具有从100 ppm时的±2%到1 ppm时的±15%的分析精度。相关性和区分研究中使用的元素的检测限远低于1 ppm。在火山灰研究中应用LA-ICP-MS进行微量元素分析的例子来自美国，新西兰和地中海。
Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) is a high spatial resolution analytical method which has been applied to the analysis of silicic tephras. With current instrumentation, around 30 trace elements can be determined from single glass shards as small as ∼ 40 µm, separated from tephra deposits. As a result of element fractionation during the ablation process using a 266 nm laser, a relatively complex calibration strategy is required. Nonetheless, such a strategy gives analyses which are accurate (typically within ±5%) and have an analytical precision which varies from ∼ ±2% at 100 ppm, to ∼ ±15% at 1 ppm. Detection limits for elements used in correlation and discrimination studies are well below 1 ppm. Examples of the application of trace element analysis by LA‐ICP‐MS in tephra studies are presented from the USA, New Zealand and the Mediterranean.