Laser ablation mass spectrometry blast through detection in R.
Laser ablation mass spectrometry blast through detection in R.
复制标题
激光烧蚀质谱爆炸通过 R 中的检测。
DOI：
10.1002/rcm.9533
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Searle-Barnes A
中科院分区：
文献类型：
--
作者：
Searle-Barnes A
生长出坚硬的碳酸盐外壳或骨架的生物，如有孔虫、珊瑚或软体动物，在生长过程中将微量元素结合到它们的外壳中，反映了它们在生活中经历的环境变化和生物活动。这些地球化学信号锁定在碳酸盐是档案馆用于代理重建研究过去的环境和气候，破译分类学的神秘物种和解决进化的气候变化的响应methodsHere，我们使用激光烧蚀电感耦合等离子体质谱（LA‐ICP‐MS）作为时间分辨收购量化的元素组成的碳酸盐外壳和骨骼。我们介绍了LABLASTER（Laser Ablation BLASt Through Endpoint in R）软件包，该软件包导入单个时间分辨LA-ICP-MS分析，然后检测激光何时消融通过碳酸盐作为信号随时间变化的函数，并输出关键汇总统计数据。我们提供了两个例子：一个化石南极有孔虫和热带珊瑚skeleton.ResultsWe提出的第一个R包，自动选择所需的数据在数据减少工作流程。这是通过使用平滑的时间序列自动检测激光何时烧蚀通过样品来实现的，然后去除偏离目标的数据点。该功能是灵活的，并动态调整，以最大限度地提高所需的地球化学目标信号的持续时间，使该软件包适用于广泛的异质生物档案。可视化工具手动validations. ConclusionsLABLASTER增加了透明度和可重复性的算法识别时，激光烧蚀完全通过样品或跨越矿物边界，因此不再记录与所需的样品相关的地球化学信号。LABLASTER专注于更好的数据目标，这意味着更准确地提取生物和地球化学信号。
RationaleOrganisms that grow a hard carbonate shell or skeleton, such as foraminifera, corals or molluscs, incorporate trace elements into their shell during growth that reflect the environmental change and biological activity they experienced during life. These geochemical signals locked within the carbonate are archives used in proxy reconstructions to study past environments and climates, to decipher taxonomy of cryptic species and to resolve evolutionary responses to climatic changes.MethodsHere, we use laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) as a time‐resolved acquisition to quantify the elemental composition of carbonate shells and skeletons. We present theLABLASTER(Laser Ablation BLASt Through Endpoint in R) package, which imports a single time‐resolved LA‐ICP‐MS analysis, then detects when the laser has ablated through the carbonate as a function of change in signal over time and outputs key summary statistics. We provide two examples within the package: a fossil planktic foraminifer and a tropical coral skeleton.ResultsWe present the first R package that automates the selection of desired data during data reduction workflows. This is achieved by automating the detection of when the laser has ablated through a sample using a smoothed time series, followed by removal of off‐target data points. The functions are flexible and adjust dynamically to maximise the duration of the desired geochemical target signal, making this package applicable to a wide range of heterogenous bioarchives. Visualisation tools for manual validation are also included.ConclusionsLABLASTERincreases transparency and repeatability by algorithmically identifying when the laser has either ablated fully through a sample or across a mineral boundary and is thus no longer documenting a geochemical signal associated with the desired sample. LABLASTER's focus on better data targeting means more accurate extraction of biological and geochemical signals.
影响因子：
3.9
作者：
Fehrenbacher, Jennifer S.;Spero, Howard J.;Eggins, Stephen
通讯作者：
Eggins, Stephen
单个有孔虫 Mg/Ca 和 Sr/Ca 分析的激光烧蚀与基于溶液的 ICP-MS 结果的比较
DOI：
10.1029/2020gc009254
发表时间：
2020
期刊：
Geosystems
影响因子：
--
作者：
Fehrenbacher, Jennifer;Marchitto, Thomas;Spero, Howard J.
通讯作者：
Spero, Howard J.
影响因子：
4.6
作者：
Chalk TB;Standish CD;D'Angelo C;Castillo KD;Milton JA;Foster GL
通讯作者：
Foster GL