Characterization of a Herrmann-type high-resolution differential mobility analyzer
| Autor: | Juha Kangasluoma, Frans Korhonen, Erkki Siivola, Tuukka Petäjä, Michel Attoui, Lauri Ahonen |
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| Rok vydání: | 2016 |
| Předmět: |
Range (particle radiation)
010504 meteorology & atmospheric sciences Resolution (mass spectrometry) Chemistry Analytical chemistry 010501 environmental sciences 01 natural sciences Pollution Aerosol Volumetric flow rate Ion Differential mobility analyzer Environmental Chemistry General Materials Science Hydraulic diameter Particle size 0105 earth and related environmental sciences |
| Zdroj: | Aerosol Science and Technology |
| ISSN: | 1521-7388 0278-6826 |
| DOI: | 10.1080/02786826.2016.1142065 |
| Popis: | Aerosol instrument characterization and verification for nanometer-sized particles requires well-established generation and classification instruments. A precise size selection of sub-3-nm charged aerosol particles requires a differential mobility analyzer (DMA), specially designed for the sub-3-nm size range. In this study, a Herrmann-type high-resolution DMA developed at Yale University was characterized in various operation conditions. A relation between sheath flow rate and tetraheptylammonium ion (C28H60N+, THA+, 1.47 nm, mobility equivalent diameter) was established. The maximum particle size that the DMA was able to classify was 2.9 nm with the highest sheath flow rate of 1427 liters per minute (Lpm), and 6.5 nm with the lowest stable sheath flow rate of 215 Lpm, restricted by the maximum and minimum flow rates provided by our blower. Resolution and transmission of DMA are reported for tetrapropylammonium (C12H28N+, TPA+, 1.16 nm), THA+, and THA2Br+ (1.78 nm) ions measured with two differen... |
| Databáze: | OpenAIRE |
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