Attenuation of metal oxide ions in inductively coupled plasma mass spectrometry with hydrogen in a hexapole collision cell
Attenuation of metal oxide ions in inductively coupled plasma mass spectrometry with hydrogen in a hexapole collision cell
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DOI：
10.1039/a905046i
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发表时间：
2000
影响因子：
3.4
通讯作者：
Zhiyang Du;R. Houk
中科院分区：
文献类型：
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作者：
Zhiyang Du;R. Houk
一些强结合的金属氧化物离子（MO+）可以在氦和氢的混合物的六极碰撞电池中衰减。选择具有不同离解能的各种金属氧化物离子，如ZrO+、CeO+、LaO+、SmO+、HoO+、YbO+和WO+，研究其衰减效果。通过调整碰撞条件，特别是碰撞气体的组成和流速以及六极直流偏置电压，可以将MO+/M+信号比抑制60倍，而原子分析离子（M+）的信号保持在原始信号的约20%。对于所研究的物质，与H2的碰撞更广泛地提高了具有较高解离能的氧化离子的MO+/M+信号比。同样的碰撞条件也有助于从背景光谱中去除大部分的ArO+、ArN+和Ar2+。
Some strongly bound metal oxide ions (MO+) can be attenuated in a hexapole collision cell with a mixture of helium and hydrogen gas. Various metal oxide ions with different dissociation energies, such as ZrO+, CeO+, LaO+, SmO+, HoO+, YbO+ and WO+, have been chosen to study the attenuation effect. By adjusting the collision conditions, especially the composition and flow rate of the collision gas and the hexapole dc bias voltage, the MO+/M+ signal ratio can be suppressed by a factor of up to 60 for CeO+ and LaO+ while maintaining ≈20% of the original signal for atomic analyte ions (M+). For the species studied, collisions with H2 improve the MO+/M+ signal ratio more extensively for oxide ions with higher dissociation energies. The same collision conditions also serve to remove most of the ArO+, ArN+ and Ar2+ from the background spectrum.