Climate Change Data Portal
| DOI | 10.5194/acp-20-7139-2020 |
| Resonance-enhanced detection of metals in aerosols using single-particle mass spectrometry | |
| Passig J.; Passig J.; Passig J.; Passig J.; Passig J.; Passig J.; Schade J.; Schade J.; Iva Rosewig E.; Iva Rosewig E.; Irsig R.; Irsig R.; Kröger-Badge T.; Kröger-Badge T.; Czech H.; Czech H.; Czech H.; Sklorz M.; Streibel T.; Streibel T.; Li L.; Li L.; Li X.; Li X.; Zhou Z.; Zhou Z.; Fallgren H.; Moldanova J.; Zimmermann R.; Zimmermann R.; Zimmermann R. | |
| 发表日期 | 2020 |
| ISSN | 16807316 |
| 起始页码 | 7139 |
| 结束页码 | 7152 |
| 卷号 | 20期号:12 |
| 英文摘要 | We describe resonance effects in laser desorption-ionization (LDI) of particles that substantially increase the sensitivity and selectivity to metals in single-particle mass spectrometry (SPMS). Within the proposed scenario, resonant light absorption by ablated metal atoms increases their ionization rate within a single laser pulse. By choosing the appropriate laser wavelength, the key micronutrients Fe, Zn and Mn can be detected on individual aerosol particles with considerably improved efficiency. These ionization enhancements for metals apply to natural dust and anthropogenic aerosols, both important sources of bioavailable metals to marine environments. Transferring the results into applications, we show that the spectrum of our KrF-excimer laser is in resonance with a major absorption line of iron atoms. To estimate the impact of resonant LDI on the metal detection efficiency in SPMS applications, we performed a field experiment on ambient air with two alternately firing excimer lasers of different wavelengths. Herein, resonant LDI with the KrF-excimer laser (248.3nm) revealed iron signatures for many more particles of the same aerosol ensemble compared to the more common ArF-excimer laser line of 193.3nm (nonresonant LDI of iron). Many of the particles that showed iron contents upon resonant LDI were mixtures of sea salt and organic carbon. For nonresonant ionization, iron was exclusively detected in particles with a soot contribution. This suggests that resonant LDI allows a more universal and secure metal detection in SPMS. Moreover, our field study indicates relevant atmospheric iron transport by mixed organic particles, a pathway that might be underestimated in SPMS measurements based on nonresonant LDI. Our findings show a way to improve the detection and source attribution capabilities of SPMS for particle-bound metals, a health-relevant aerosol component and an important source of micronutrients to the surface oceans affecting marine primary productivity. © 2020 Copernicus GmbH. All rights reserved. |
| 关键词 | aerosolbioavailabilitydustionizationmass spectrometryprimary productionresonancetrace elementwavelength |
| 语种 | 英语 |
| 来源机构 | Atmospheric Chemistry and Physics |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/131970 |
| 推荐引用方式 GB/T 7714 | Passig J.,Passig J.,Passig J.,et al. Resonance-enhanced detection of metals in aerosols using single-particle mass spectrometry[J]. Atmospheric Chemistry and Physics,2020,20(12). |
| APA | Passig J..,Passig J..,Passig J..,Passig J..,Passig J..,...&Zimmermann R..(2020).Resonance-enhanced detection of metals in aerosols using single-particle mass spectrometry.,20(12). |
| MLA | Passig J.,et al."Resonance-enhanced detection of metals in aerosols using single-particle mass spectrometry".20.12(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
