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首页> 外文期刊>Spectrochimica Acta, Part B. Atomic Spectroscopy >Effects of sample probe insertion on plasma conditions in direct sample insertion-inductively coupled plasma-atomic emission spectrometry
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Effects of sample probe insertion on plasma conditions in direct sample insertion-inductively coupled plasma-atomic emission spectrometry

机译：直接样品插入-电感耦合等离子体-原子发射光谱法中样品探针插入对血浆条件的影响

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摘要

The effects of sample probe insertion on plasma elicitation conditions in direct sample insertion-inductively coupled plasma-atomic emission spectrometry (DSI-ICP-AES) were investigated. Graphite sample probes in the form of a cup and a rod (with or without undercut) were used. Molybdenum rods were also used for comparison. A dark central channel is created in the plasma when a sample probe is inserted. The diameter of the central channel correlates with the diameter of the sample probe. In addition, the plasma excitation conditions were monitored using repetitive laser sampling to introduce a steady how of Zn or Fe particles into the ICP. Changes in the relative excitation temperature and electron number density of the plasma were deduced from the ratios of the emission intensities of Fe line pail and Zn line pair, respectively. The temperature and electron number density of the plasma decreased when a sample probe was inserted. The degree of changes in the plasma conditions depends on the diameter of the sample probes, regardless of the form and material of the probe. The diameter of the sample probe instead of its mass plays a significant role in perturbing the plasma excitation conditions. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 24]
机译：在直接样品插入-电感耦合等离子体原子发射光谱法（DSI-ICP-AES）中，研究了样品探针插入对血浆激发条件的影响。使用杯形和棒形（带或不带底切）形式的石墨样品探针。钼棒也用于比较。插入样品探针后，血浆中会形成一个黑暗的中央通道。中央通道的直径与样品探针的直径相关。此外，使用重复激光采样监测等离子体激发条件，以将稳定的Zn或Fe颗粒引入ICP。分别从Fe线桶和Zn线对的发射强度的比值推导出等离子体的相对激发温度和电子数密度的变化。当插入样品探针时，等离子体的温度和电子数密度降低。血浆条件的变化程度取决于样品探针的直径，而不管探针的形式和材料如何。样品探针的直径而不是其质量在扰动等离子体激发条件方面起着重要作用。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：24]

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