Flow injection system for ICP-MS

这项提案是为了购买Perkin-Elmer(P-E)流动注射分析系统(FIAS-400)，用于样品引入、基质修改和氢化物发生，该系统将与我们的P-E/Sciex Elan DRC-plus ICP-MS接口。这个附件是为了绕过一些分析困难，这些困难阻碍了至少四个仪器使用者和他们的学生的研究计划的进展。这些分析困难的出现是因为它们的场和实验溶液的总溶解固体含量很高。直接注入这些溶液会导致进样器堵塞、界面区域严重的电荷基质效应以及进样锥体对质谱仪的覆盖，从而降低灵敏度/精密度并增加背景。将受益于这一研究工具的研究项目包括正在进行的圣劳伦斯下河口和海湾缺氧(缺氧)底层水域的发展和影响的研究，陆架和斜坡沉积物中古氧作用的重建，以及成矿热液系统中金属运移的调查，特别是蒸气运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.