Real-time, ultrasensitive monitoring of air toxics by laser photoionization time-of-flight mass spectroscopy
Castaldi, MJ; Senkan, SM
HERO ID
13280
Reference Type
Journal Article
Year
1998
Language
English
PMID
| HERO ID | 13280 |
|---|---|
| In Press | No |
| Year | 1998 |
| Title | Real-time, ultrasensitive monitoring of air toxics by laser photoionization time-of-flight mass spectroscopy |
| Authors | Castaldi, MJ; Senkan, SM |
| Journal | Journal of the Air and Waste Management Association |
| Volume | 48 |
| Issue | 1 |
| Page Numbers | 77-81 |
| Abstract | Toxic Combustion By-Products Consortium of Companies; the National Science Foundation; U.S. Environmental Protection Agency; University of California. Gas phase concentrations of individual polycyclic aromatic hydrocarbons (PAHs) were measured in real time in combustion products from a co-flow diffusion flame using laser photoionization (LP) time-of-flight mass spectrometry (TOF/MS). In particular, a naphthalene detection sensitivity of 4 parts per billion (ppb) was demonstrated. The use of calibration mixtures with argon indicated the feasibility of naphthalene detection at about 45 parts per trillion (ppt) at a signal-to-noise (S/N) ratio of 20. This suggests the possibility of low-ppt level detection at a S/N of 1. The novelty of the system is the use of a heated sampling probe and a continuously purged, heated-pulse valve that was positioned close to the ionization zone, thereby allowing the generation of photoions in the high-density region of the sample jet, where concentrations of PAH are high. Because the system developed allows for the real time detection of select species, it represents a useful tool in continuous emissions monitoring (CEM) for environmental compliance as well as direct process control. |
| Doi | 10.1080/10473289.1998.10463663 |
| Pmid | 15656002 |
| Wosid | WOS:000071805100010 |
| Url | <Go to ISI>://WOS:000071805100010 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | ECRIB.J. Air Waste Manage. Assoc. 48: 77-81. |
| Is Public | Yes |
| Language Text | English |
| Keyword | Air Pollutants; Polycyclic Aromatic Hydrocarbons; Index Medicus; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; Polycyclic Aromatic Hydrocarbons -- analysis; Polycyclic Aromatic Hydrocarbons -- toxicity; Air Pollutants -- toxicity; Air Pollutants -- analysis |
| Is Qa | No |
| Relationship(s) |
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