An investigation into LA-spICP-ToF-MS uses for in situ measurement of environmental multi-elemental nanoparticles,Journal of Analytical Atomic Spectrometry

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An investigation into LA-spICP-ToF-MS uses for in situ measurement of environmental multi-elemental nanoparticles
Journal of Analytical Atomic Spectrometry ( IF 3.1 ) Pub Date : 2021-08-14 , DOI: 10.1039/d1ja00112d
Timothy Ronald Holbrook ₁ , Doriane Gallot-Duval _{1,

2} , Thorsten Reemtsma _{1,

3} , Stephan Wagner ₁

Affiliation

Characterization and investigation into complex nano-fraction particle samples have traditionally been done using nebulizer single particle inductively coupled plasma mass spectrometry (neb-spICP-MS). Here a method was developed and tested for the direct analysis of multi-elemental particles (MEPs) in sediment samples using laser ablation (LA-spICP-ToF-MS). A comparison between the neb-spICP-ToF-MS and LA-spICP-ToF-MS was made to determine possible differences and advantages of the techniques using standard AgAu core–shell particles and environmental samples obtained via cloud point extraction procedures of a road runoff sedimentation basin. Using the results obtained by this method comparison, comparison metrics were then used to test the usability of LA-spICP-ToF-MS on unextracted sediment. Three main groups of signals were identified, overly abundant signals which cannot be used for single-particle analysis at the chosen measurement parameters, highly abundant signals that when compared with the two previous methods produced comparable results for elemental ratios and single-particle fingerprinting. Lastly, low abundant well-defined elements such as the platinum group elements (PGEs) were ideally suited for measurement from unextracted sediment. The introduced LA-spICP-ToF-MS is likely suitable for the analysis of MEPs for groups 2 and 3 in sediment samples with minimal sample preparation (sediment homogenization, drying, and distribution of sediment on tape) and capable of MEP source allocation for the reported element groups.

中文翻译：

LA-spICP-ToF-MS 用于环境多元素纳米粒子原位测量的研究

传统上使用雾化器单颗粒电感耦合等离子体质谱 (neb-spICP-MS) 对复杂的纳米级颗粒样品进行表征和研究。这里开发并测试了一种使用激光烧蚀 (LA-spICP-ToF-MS) 直接分析沉积物样品中多元素粒子 (MEP) 的方法。对 neb-spICP-ToF-MS 和 LA-spICP-ToF-MS 进行了比较，以确定使用标准 AgAu 核壳颗粒和通过以下方式获得的环境样品的技术的可能差异和优势道路径流沉淀池浊点提取程序[J]. 使用通过该方法比较获得的结果，然后使用比较指标来测试 LA-spICP-ToF-MS 对未提取沉积物的可用性。确定了三组主要信号，在选定的测量参数下不能用于单粒子分析的过度丰富的信号，与前两种方法相比产生的元素比率和单粒子指纹识别结果相当的高丰度信号。最后，铂族元素 (PGE) 等低丰度明确定义的元素非常适合从未提取的沉积物中进行测量。

更新日期：2021-08-19

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