A dynamic reaction cell for inductively coupled plasma mass spectrometry (ICP-DRC-MS). Part III. Optimization and analytical performance
A dynamic reaction cell for inductively coupled plasma mass spectrometry (ICP-DRC-MS). Part III. Optimization and analytical performance
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DOI：
10.1039/b002604m
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发表时间：
2000
影响因子：
3.4
通讯作者：
S. Tanner;V. Baranov;U. Völlkopf
中科院分区：
文献类型：
--
作者：
S. Tanner;V. Baranov;U. Völlkopf
动态反应池（DRC）是一个rf/dc四极杆，可以用反应气体加压，以促进离子-分子反应，以抑制基于等离子体的等压干扰，用于痕量元素分析。调整DRC的带通，以抑制通过反应细胞内的连续反应产生的新干扰的出现。DRC也可以在低压（通风，无碰撞条件下）下运行，以模拟常规ICP-MS。本文描述了一种适用于排气和加压模式的实用优化程序，并举例说明了对等离子体和细胞等压干扰的抑制。给出了仪器的分析性能特征，包括等压阻效率、纯净水和纯过氧化氢的检出限、短期和长期稳定性、氯溶液中砷的测定和硒同位素的测定。
The dynamic reaction cell (DRC) is a rf/dc quadrupole which may be pressurized with a reactive gas in order to promote ion–molecule reactions intended to suppress plasma-based isobaric interferences for trace elemental analysis. The bandpass of the DRC is adjusted in order to suppress the appearance of new interferences produced through sequential reactions within the reaction cell. The DRC may alternatively be operated at low pressure (vented, under collision-free conditions) to emulate conventional ICP-MS. A practical optimization procedure for both the vented and pressurized modes is described, with examples showing the suppression of both plasma-based and cell-based isobaric interferences. The analytical performance characteristics of the instrument, including efficiency of isobar rejection, detection limits in clean water and in neat hydrogen peroxide, short- and long-term stability, determination of arsenic in chloride solution and Se isotope determination, are provided.