Direct injection high efficiency nebulizer for analytical spectrometry
文献类型：专利
| 作者 | MONTASER, AKBAR; MCLEAN, JOHN A.; KACSIR, JEROLD M. |
| 发表日期 | 2000-12-26 |
| 专利号 | US6166379 |
| 著作权人 | GEORGE WASHINGTON UNIVERSITY |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Direct injection high efficiency nebulizer for analytical spectrometry |
| 英文摘要 | A simple, relatively low-cost direct injection high efficiency nebulizer (DIHEN) is suitable for argon inductively coupled plasma (Ar ICP) spectrometry. The DIHEN may be operated at solution uptake rates of 1-100 mu L/min. Analytical performance indices for the DIHEN and fundamental characteristics of the aerosol produced are obtained using an ICP mass spectrometer (ICPMS) and a 2-dimensional phase Doppler particle analyzer (2D PDPA), respectively. Results are compared to those obtained with a conventional crossflow pneumatic nebulizer (PN), equipped with a Scott-type spray chamber. Droplet sizes and velocities produced with the DIHEN are smaller than those reported for the direct injection nebulizer (DIN). The DIHEN offers optimal sensitivity at low injector gas flow rates (approx. 0.25 L/min) and high RF power (approx. 5 kW). For the 17 elements tested, detection limits (ppt) and sensitivities achieved with the DIHEN (at 85 mu L/min) are similar to or better than those obtained on the same instrument using the PN (at 1 mL/min). However, because the primary aerosol is injected directly into the plasma, oxide-to-metal ion ratios (MO+/M+) are high as in the case of the DIN. The utility of the DIHEN for the analysis of small volume samples is demonstrated by microscale flow injection analysis ( mu FIA) of Cr bound to human lung DNA. Detection of Cr at the femtogram level is feasible. |
| 公开日期 | 2000-12-26 |
| 申请日期 | 1998-04-08 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/34464]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | GEORGE WASHINGTON UNIVERSITY |
| 推荐引用方式 GB/T 7714 | MONTASER, AKBAR,MCLEAN, JOHN A.,KACSIR, JEROLD M.. Direct injection high efficiency nebulizer for analytical spectrometry. US6166379. 2000-12-26. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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