Development of New Sample Introduction System and Excitation/Ionization Source for Nano-Litter Samples

作者：Miyahara Hidekazu^*; Shigeta Kaori; Nakashima Naoki; Nagata Youichi; Okino Akitoshi

来源：Bunseki Kagaku, 2010, 59(5): 363-378.

DOI：10.2116/bunsekikagaku.59.363

• ICP
• sample introduction
• direct injection
• excitation/ionization source
• nano-litter analysis
• droplet nebulizer
• multi-gas ICP
• micro plasma

In recent years, along with the development of metallomics and nanotechnology, the focus target of elemental analysis has been shifted to smaller samples, such as bio cells and nano-particles. Argon-inductively coupled plasma (Ar-ICP) is widely used as an ionization or excitation source for elemental analysis, because of the analytical figures of merit. However, the conventional ICP system consumes a relatively large volume (typically 1 mL min(-1)) of sample solutions, and thus is not suitable for the analysis of smaller amounts of samples. Additionally, the determination of a higher ionization potential element, such as halogens, was difficult. In order to overcome these problems, a new sample-introduction system and a new plasma sources have been developed by our group. In this paper, we report an three original devices : (i) a droplet direct injection nebulizer (D-DIN) system in which aqueous solutions are not nebulized, but directly injected into the plasma with just a single droplet or a series of small droplets; (ii) a multi-gas ICP which can sustain Ar, N(2), CO(2), O(2), He and air plasma at atmospheric pressure; and (iii) a multi-gas microplasma source that can generate a high-density and high-temperature plasma under atmospheric pressure using various gases.

• 出版日期2010-5