评估50个元素与NO的气相离子反应性以及239Pu在复杂矩阵中的直接应用,使用ICP-MS/MS
Kirby P Hobbs1, Amanda D French1, Kali M Melby1
1Pacific Northwest National Laboratory, Richland, Washington 99352, United States.
Analytical chemistry
|April 4, 2024
概括
在ICP-MS/MS中的氧化 (NO) 有效地测量复杂样品中的-239. 这种方法可以在没有事先化学分离的情况下去除干扰,这对于核取证应用至关重要.
科学领域:
- 分析化学 分析化学
- 质谱测量质量谱测量
- 核化学 核化学 核化学
背景情况:
- 诱导合等离子体双重质谱法 (ICP-MS/MS) 需要仔细选择反应气体以解决分析物/干扰物对.
- 氧化 (NO) 已被证明是一个有前途的反应气体,但其在广泛的元素中的反应性和其在复杂矩阵中的应用仍然未得到充分探索.
研究的目的:
- 在ICP-MS/MS中,系统地研究50个元素与氧化 (NO) 的反应性.
- 为了验证反应度的理论建模,用于选潜在反应气体.
- 开发和演示一种方法来量化-239 (Pu) 在具有挑战性的环境矩阵中使用NO.
主要方法:
- 在ICP-MS/MS设置中研究了50个元素与NO的反应.
- 利用反应的理论建模来预测和选气体反应性.
- 开发了一种测量Pu-239的方法,通过反应形成Pu-16O+,在m/z=255.5时进行监测.
- 使用-239和U-238添加的标准参考材料验证了该方法.
主要成果:
- 已确定的周期性趋势是金属阴离子与NO的反应性.
- 验证了理论反应度建模作为气体选择的预测工具.
- 在没有化学分离的情况下,在和矩阵成分的存在下成功测量了Pu-239.
- 在复杂的环境矩阵中,在6%的尖端值内实现了精确的Pu-239测量.
结论:
- 氧化是ICP-MS/MS的多功能反应气体,可用于元素的分析,包括像Pu-239这样的活性化物.
- 开发的方法允许在环境样本中直接测量与核取证相关的Pu-239,绕过复杂的样本准备.
- 这项研究为NO反应性及其在先进质谱技术中的应用提供了基础数据集.
相关概念视频
Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences
458
Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and...
458
Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview
730
In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
730
Atomic Emission Spectroscopy: Lab
161
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
161
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
604
Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
604
Chemical Ionization (CI) Mass Spectrometry
742
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
742


