Laser ablation sample introduction system for ICP-MS elemental analysis

用于 ICP-MS 元素分析的激光烧蚀样品引入系统

• 批准号: RTI-2017-00331
• 负责人: Brenan, James
• 金额: $ 10.93万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=616638
• 关键词: Laser; ablation; sample; introduction; system

The successful development of inductively coupled plasma mass spectrometers (ICP-MS) now makes it possible to perform rapid, precise abundance and isotope analysis of a large array of elements at very low concentration levels. This technology, combined with the ability to microsample solid materials by laser ablation (LA), produces an instrument (LA-ICP-MS) with the ability to measure element abundances in samples with a high degree of sensitivity and spatial resolution. Thus, LA-ICP-MS constitutes the single most powerful microanalytical technique currently available. An additional attribute of LA-ICP-MS is the capacity to perform time-resolved analyses, in which the element abundance is monitored during ablation into the sample. This technique provides essential information bearing on the homogeneity of the sample, the presence of submicron-scale inclusions of discrete phases, and can be used to quantify element abundances in materials that produce transient signals, such as fluid or melt inclusions or nanoparticles. In most cases, minimal sample preparation is required. A broad range of solids can be measured by this method, including transparent glasses, battery feedstock, semiconductors, bone, hair, mineral specimens, metals, etc. Funds are requested to purchase a complete laser ablation sample delivery system, consisting of a 213 nm laser with beam delivery optics, automated stage, ablation cell, video imaging and data reduction software. This sample introduction system will be coupled to the existing Thermo Scientific iCAP Q ICP-MS located in Dalhousie’s Health and Environments Research Centre [HERC] Laboratory. This combined sample introduction and analysis system will thereby provide the regional research community with a new analytical capability, enabling advances in a wide range of areas in which trace element microanalysis is required.

电感耦合等离子体质谱仪 (ICP-MS) 的成功开发现在可以对极低浓度水平的大量元素进行快速、精确的丰度和同位素分析，该技术与对固体材料进行微量采样的能力相结合。通过激光烧蚀 (LA)，生产出一种仪器 (LA-ICP-MS)，能够以高灵敏度和空间分辨率测量样品中的元素丰度，因此，LA-ICP-MS 构成了最强大的仪器。 LA-ICP-MS 的另一个特点是能够进行时间分辨分析，在样品消融过程中监测元素丰度。离散相的亚微米级夹杂物的存在，可用于量化产生瞬态信号的材料中的元素丰度，例如流体或熔体夹杂物或纳米颗粒。在大多数情况下，需要最少的样品制备。可以通过这种方法进行测量，包括透明玻璃、电池原料、半导体、骨头、头发、矿物标本、金属等。需要资金购买完整的激光烧蚀样品传输系统，包括带有光束传输光学器件的213 nm激光器、自动化平台、消融室、视频成像和数据缩减软件。该样品引入系统将与位于达尔豪斯健康与环境研究中心 [HERC] 实验室的现有 Thermo Scientific iCAP Q ICP-MS 相结合。样品引入和分析系统将为区域研究界提供新的分析能力，从而在需要微量元素微量分析的广泛领域取得进展。