Flow injection system for ICP-MS

本提案旨在购买Perkin-Elmer（P-E）流动注射分析系统（FIAS-400），用于样品导入、基质改性和氢化物生成，该系统将连接到我们的P-E/SciEx Elan DRC-plus ICP-MS。该附件需要规避一些分析困难，这些困难阻碍了至少四个仪器用户及其学生的研究计划的进展。这些分析困难的出现是因为他们的现场和实验解决方案的总溶解固体含量高。这些溶液的直接进样导致进样器堵塞、界面区域中的严重电荷矩阵效应和质谱仪入口锥体的涂层，从而降低灵敏度/精度并增加背景。将受益于这一研究工具的研究方案包括：正在进行的关于下圣劳伦斯河口和海湾贫氧（缺氧）底层沃茨的发展和影响的研究、陆架和斜坡沉积物中的古氧合重建，以及对成矿热液系统中金属迁移的调查，特别是蒸汽迁移在岩浆成因系统中的作用。

This proposal is for the purchase of a Perkin-Elmer (P-E) Flow Injection Analysis System (FIAS-400) for sample introduction, matrix modification and hydride generation that will be interfaced to our P-E/SciEx Elan DRC-plus ICP-MS. This accessory is required to circumvent some of the analytical difficulties that impede the progress of the research programs of at least four of the instrument's users and their students. These analytical difficulties arise because of the high total dissolved solid content of their field and experimental solutions. Direct injection of these solutions leads to clogging of the injector, severe charge-matrix effects in the interface region and coating of the inlet cones to the mass spectrometer, reducing sensitivity/precision and increasing backgrounds. The research programs that would benefit from this research tool include ongoing studies on the development and impact of oxygen-depleted (hypoxic) bottom waters in the Lower St. Lawrence Estuary and Gulf, paleo-oxygenation reconstruction in shelf and slope sediments, and an investigation of the transport of metals in ore-forming hydrothermal systems, particularly the role of vapour-transport in those of magmatic origin.