TERMITE: An R script for fast reduction of laser ablation inductively coupled plasma mass spectrometry data and its application to trace element measurements.

TERMITE: An R script for fast reduction of laser ablation inductively coupled plasma mass spectrometry data and its application to trace element measurements.
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TERMITE:用于快速减少激光烧蚀电感耦合等离子体质谱数据及其在痕量元素测量中的应用的 R 脚本

DOI:
10.1002/rcm.7895
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发表时间:
2017
期刊:
Rapid communications in mass spectrometry : RCM
影响因子:
--
通讯作者:
Scholz
Scholz
中科院分区:
--
文献类型:
--
作者:
Mischel;Mertz-Kraus;Jochum;Scholz

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高空间分辨率激光烧蚀电感耦合等离子体质谱法(LA-ICPMS)测定痕量元素浓度在地质和环境研究中具有重要意义。数据简化是LA‐ICP‐MS的一个非常重要的方面,并且有几个用于处理LA‐ICPMS痕量元素数据的商业程序可用。这些软件包中的每一个都有其特定的优点和缺点。MethodsHere,我们提出了TERMITE,一个用于减少LA‐ICPMS数据的Rscript,它可以减少点和线扫描测量。几个参数可以由用户调整,用户不一定需要R的先验知识。目前,已实现了10种具有不同基质的标准物质,用于校准LA‐ICPMS数据,用户可以添加其他标准物质。TERMITE还提供了一个可选的离群值测试,结果以图形方式(作为PDF文件),以及数字(作为CSV文件)。ResultsAs一个例子,我们应用TERMITE的洞穴沉积物样品和使用商业软件GLITTER获得的结果进行比较。这两个程序给出了类似的结果。TERMITE特别适用于主要元素组成均匀的样品(特别是用作内标的元素),以及使用相同的分析参数进行多次测量的情况。在这种情况下,使用TERMITE进行数据评估比使用所有其他可用软件都要快得多,并且可以在不到一分钟的时间内计算出100多个单点测量的浓度。结论TERMITE是一种用于简化LA‐ICPMS数据的开源软件,特别适用于快速、可重复地评估主要元素组成均匀的大型样品数据集。版权所有© 2017约翰威利父子有限公司
RationaleHigh spatial resolution Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA‐ICPMS) determination of trace element concentrations is of great interest for geological and environmental studies. Data reduction is a very important aspect of LA‐ICP‐MS, and several commercial programs for handling LA‐ICPMS trace element data are available. Each of these software packages has its specific advantages and disadvantages.MethodsHere we present TERMITE, anRscript for the reduction of LA‐ICPMS data, which can reduce both spot and line scan measurements. Several parameters can be adjusted by the user, who does not necessarily need prior knowledge inR. Currently, ten reference materials with different matrices for calibration of LA‐ICPMS data are implemented, and additional reference materials can be added by the user. TERMITE also provides an optional outlier test, and the results are provided graphically (as a pdf file) as well as numerically (as a csv file).ResultsAs an example, we apply TERMITE to a speleothem sample and compare the results with those obtained using the commercial software GLITTER. The two programs give similar results. TERMITE is particularly useful for samples that are homogeneous with respect to their major element composition (in particular for the element used as an internal standard) and when many measurements are performed using the same analytical parameters. In this case, data evaluation using TERMITE is much faster than with all other available software, and the concentrations of more than 100 single spot measurements can be calculated in less than a minute.ConclusionsTERMITE is an open‐source software for the reduction of LA‐ICPMS data, which is particularly useful for the fast, reproducible evaluation of large datasets of samples that are homogeneous with respect to their major element composition. Copyright © 2017 John Wiley & Sons, Ltd.
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