System for generating high-yield negative ions for ICP-MS

• Main Authors: JAVAHERI, GURAMREZA, MOSTAGHAIMI, JAVAD, ALAVI SINA, KAHEN KAVEH
• Format: Patent
• Language: Chinese; English
• Published: 02.02.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

Disclosed is a novel ICP-MS ion transfer method capable of generating and transporting high yields of positive and negative ions, capable of quenching unwanted metastable state ions and neutral particles when using existing ICP torches. Dopants are added in various pressure regions of the mass spectrometer interface, wherein the reaction time is suitable for the occurrence of a gas phase ion/molecule reaction. Introduction of dopants or analytes in the provided RF confinement field generates high yields of negative ions in various pressure regions of the mass spectrometer. Mechanisms utilizing free electrons and metastable neutral particles (e.g., Ar *) are used to form high yields of negatively charged elements that are initially atomized within the plasma and steady in the form of anions. 公开了一种新的ICP-MS离子转移方法，其能够生成和传输高产率的正离子和负离子，能够在使用现有ICP炬管时淬灭不需要的亚稳态离子和中性粒子。在质谱仪接口的各个压力区域中添加掺杂剂，其中反应时间适于气相离子/分子反应的发生。在所提供的RF限制场中引入掺杂剂或分析物在质谱仪的各个压力区域中生成高产率的负离子。利用自由电子和亚稳态中性粒子(例如Ar*)的机制用于形成高产率的带负电的元素，这些元素最初在等离子体内原子化并呈负离子形式稳态。