NDLI: Correlations in the chemical composition of rural background atmospheric aerosol in the UK determined in real time using time-of-flight mass spectrometry

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Correlations in the chemical composition of rural background atmospheric aerosol in the UK determined in real time using time-of-flight mass spectrometry

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Correlations in the chemical composition of rural background atmospheric aerosol in the UK determined in real time using time-of-flight mass spectrometry

Content Provider	Royal Society of Chemistry (RSC)
Author	Harrison, Roy M. Nicholson, David H. Beddows, David C. S. Heal, Mathew R. Donovan, Robert J. Thompson, Katherine C. King, Martin D. Kinnersley, Robert P.
Copyright Year	2004
Abstract	An aerosol time-of-flight mass spectrometer (ATOFMS) was used to determine, in real time, the size and chemical composition of individual particles in the atmosphere at the remote inland site of Eskdalemuir, Scotland. A total of 51 980 particles, in the size range 0.3–7.4 µm, were detected between the 25th and 30th June 2001. Rapid changes in the number density, size and chemical composition of the atmospheric aerosol were observed. These changes are attributed to two distinct types of air mass; a polluted air mass that had passed over the British mainland before reaching Eskdalemuir, interposed between two cleaner air masses that had arrived directly from the sea. Such changes in the background aerosol could clearly be very important to studies of urban aerosols and attempts at source apportionment. The results of an objective method of data analysis are presented. Correlations were sought between the occurrence of: lithium, potassium, rubidium, caesium, beryllium, strontium, barium, ammonium, amines, nitrate, nitrite, boron, mercury, sulfate, phosphate, fluorine, chlorine, bromine, iodine and carbon (both elemental and organic hydrocarbon) in both fine (d < 2.5 µm) and coarse (d > 2.5 µm) particle fractions. Several previously unreported correlations were observed, for instance between the elements lithium, beryllium and boron. The results suggest that about 2 in 3 of all fine particles (by number rather than by mass), and 1 in 2 of all coarse particles containing carbon, consisted of elemental carbon rather than organic hydrocarbon (although a bias in the sensitivity of the ATOFMS could have affected these numbers). The ratio of the number of coarse particles containing nitrate anions to the number of particles containing chloride anions exceeded unity when the air mass had travelled over the British mainland. The analysis also illustrates that an air mass of marine origin that had travelled slowly over agricultural land can accumulate amines and ammonium.
Starting Page	124
Ending Page	133
Page Count	10
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	6
Issue Number	2
Journal	Journal of Environmental Monitoring
DOI	10.1039/b311209h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Eskdalemuir Scotland Aerosol Time-of-flight mass spectrometry Micrometre Number density Lithium Potassium Rubidium Caesium Beryllium Strontium Barium Ammonium Nitrate Nitrite Boron Sulfate Phosphate Fluorine Chlorine Bromine Iodine Carbon Hydrocarbon Chloride
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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