共查询到20条相似文献,搜索用时 156 毫秒
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激光烧蚀光谱(LAS)技术具有空间分辨率高,样品用量少,制样简单,分析速度快,可远程、实时、在线分析多相物质(气态、液态、固态)的特点,是近年来发展迅速的一种分析技术,具有广阔的应用前景,但它对痕量元素的分析能力不足。电感耦合等离子体质谱(ICP-MS)技术具有灵敏度高和多元素及同位素同时检测的能力,在微痕量元素精密分析方面具有很大的优势,但对基体元素分析存在困难。将LAS和ICP-MS技术相结合,形成LAS和LA-ICP-MS联用技术(LAS-ICP-MS),可充分利用两种技术的优势,形成互补技术,为地质分析提供一种便捷、可靠的分析手段:利用LAS技术,可预先监测样品的大致含量与信号的稳定性等参数,筛选适用于LA-ICP-MS分析的样品,避免因元素含量过高引起的LA-ICP-MS采样锥锥口易堵塞,基体效应过大,以及因样品均匀性差或激光参数未优化等因素影响分析的准确性和精密度等问题;利用LA-ICP-MS技术,可对激光进样条件和原子化、离子化条件分开进行优化,从而改善仪器的分析性能。将LAS-ICP-MS用于岩石矿物分析,表现出其良好的应用前景 相似文献
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本文介绍ICP-MS和ICP-OES联机所诞生的等离子体光质谱仪,即POEMS。POEMS的特点和主要性能. 相似文献
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电感耦合等离子体质谱(ICP-MS)是分析领域发展十分迅速的一种新技术,目前已广泛应用于环境监测、生物医学、地质测年、食品检测、材料科学等领域.本文就ICP-MS的原理及特点进行介绍,并详细分析了其不同类型的干扰问题(质谱干扰、非质谱干扰)及其相应的校正方法;同时评述了在环境监测和食品检测这两大重要领域中铅的电感耦合等离子体质谱分析(主要包括含量测定、同位素比值测定、形态分析)的概况和趋势,且对其进行了展望. 相似文献
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电感耦合等离子体质谱(ICP-MS)技术已有40年发展历史,到目前为止,该方法仍然是无机元素分析领域最具影响力的高灵敏度分析技术。在核地质研究领域,ICP-MS已经成为铀矿地质勘查和高放废物地质处置的核心分析技术,每年为核地质科研生产提供大量的分析测试数据。应用ICP-MS分析的对象涉及水、土壤、沉积物、岩石、矿物、气体和天然类似物等,分析的元素达到70多种。本文总结了本实验室在核地质研究中应用ICP-MS的实践。 相似文献
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Diane Beauchemin 《Mass spectrometry reviews》2010,29(4):560-592
This article reviews the numerous ways in which inductively coupled plasma mass spectrometry has been used for the analysis of environmental samples since it was commercially introduced in 1983. Its multielemental isotopic capability, high sensitivity and wide linear dynamic range makes it ideally suited for environmental analysis. Provided that some care is taken during sample preparation and that appropriate calibration strategies are used to circumvent non‐spectroscopic interferences, the technique is readily applicable to the analysis of a wide variety of environmental samples (natural waters, soils, rocks, sediments, vegetation, etc.), using quadrupole, time‐of‐flight or double‐focusing sector‐field mass spectrometers. In cases where spectroscopic interferences arising from the sample matrix cannot be resolved, then separation methods can be implemented either on‐ or off‐line, which can simultaneously allow analyte preconcentration, thus further decreasing the already low detection limits that are achievable. In most cases, the blank, prepared by following the same steps as for the sample but without the sample, limits the ultimate detection limits that can be reached. © 2009 Wiley Periodicals, Inc., Mass Spec Rev 29:560–592, 2010 相似文献
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Laser ablation‐inductively coupled plasma mass spectrometry (LA‐ICPMS) is a solid sampling technique in continuous expansion in all types of research fields in which direct multi‐elemental or isotopic analysis is required. In particular, this technique shows unique characteristics that made its use recommended in many archaeometric applications, where valuable solid artifacts are often the target samples, because it offers flexibility to achieve spatially resolved information with high detection power and a wide linear range, in a fast and straightforward way, and with minimal sample damage. The current review provides a systematic survey of publications that reported the use of LA‐ICPMS in an archaeological context, highlights its main capabilities and limitations and discusses the most relevant parameters that influence the performance of this technique for this type of application. © 2009 Wiley Periodicals, Inc., Mass Spec Rev 29:55–78, 2010 相似文献
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建立了电感耦合等离子体发射光谱法(ICP-AES)同时测定锆材中铪、铁、铬元素含量的方法。样品用硝酸-氢氟酸溶解,探讨了基体锆对元素铪、铁、铬以及铪、铁、铬相互之间的干扰情况,确定了铪、铁、铬元素最佳分析谱线分别为264.141nm,238.204nm,267.716nm。线性相关系数r≥0.9999,加标回收率均为95%~105%,铪、铁、铬的相对标准偏差小于3%(n=11)。该方法简便、快速、准确,满足锆材日常生产的检测要求。 相似文献
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J. Sabine Becker Miroslav Zoriy Andreas Matusch Bei Wu Dagmar Salber Christoph Palm J. Susanne Becker 《Mass spectrometry reviews》2010,29(1):156-175
The distribution analysis of (essential, beneficial, or toxic) metals (e.g., Cu, Fe, Zn, Pb, and others), metalloids, and non‐metals in biological tissues is of key interest in life science. Over the past few years, the development and application of several imaging mass spectrometric techniques has been rapidly growing in biology and medicine. Especially, in brain research metalloproteins are in the focus of targeted therapy approaches of neurodegenerative diseases such as Alzheimer's and Parkinson's disease, or stroke, or tumor growth. Laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) using double‐focusing sector field (LA‐ICP‐SFMS) or quadrupole‐based mass spectrometers (LA‐ICP‐QMS) has been successfully applied as a powerful imaging (mapping) technique to produce quantitative images of detailed regionally specific element distributions in thin tissue sections of human or rodent brain. Imaging LA‐ICP‐QMS was also applied to investigate metal distributions in plant and animal sections to study, for example, the uptake and transport of nutrient and toxic elements or environmental contamination. The combination of imaging LA‐ICP‐MS of metals with proteomic studies using biomolecular mass spectrometry identifies metal‐containing proteins and also phosphoproteins. Metal‐containing proteins were imaged in a two‐dimensional gel after electrophoretic separation of proteins (SDS or Blue Native PAGE). Recent progress in LA‐ICP‐MS imaging as a stand‐alone technique and in combination with MALDI/ESI‐MS for selected life science applications is summarized. © 2009 Wiley Periodicals, Inc., Mass Spec Rev 29:156–175, 2010 相似文献
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电感耦合等离子体质谱技术新进展 总被引:11,自引:0,他引:11
本文综述了 1 995年至 1 998年间电感耦合等离子体质谱技术的新进展 ,包括激光烧蚀_ICP_MS、电热蒸发_ICP_MS、多级联用技术、非谱干扰及其克服方法、ICP_MS仪器进展和机理研究 ,引用参考文献 34 3篇 相似文献