Analysis of Gas Phase Halogen Compounds Using Atmospheric Pressure IonizationMass Spectrometry
INTRODUCTION Environmental chamber studies involve numerous chemical compounds with a variety of physical properties that make it difficult to identify all of them with a single analytical technique. Mass spectrometry is unique in its ability to detect most compounds, and is a valuable component for...
| Main Authors: | , , , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.24.9888 http://www.cert.ucr.edu/~carter/epacham/foster1.pdf |
| Summary: | INTRODUCTION Environmental chamber studies involve numerous chemical compounds with a variety of physical properties that make it difficult to identify all of them with a single analytical technique. Mass spectrometry is unique in its ability to detect most compounds, and is a valuable component for environmental chamber studies because of this characteristic. We show here that atmospheric pressure ionization-mass spectrometry (API-MS) in the negative ion mode is a highly sensitive and selective technique ideal for measuring halogen compounds such as HOCl, Cl 2 , and Br 2 both in laboratory systems and in air. This presentation will focus on the quantitative analysis of HOCl with API-MS [Foster et al., 1999]. Field studies show elevated bromine measurements correlated with surface-level O 3 depletion in the Arctic spring [Barrie et al., 1988]. In order to explain these observations, a very large |
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