Online Detection of Volatile Organic Compounds in Air at Parts-per-Trillion Levels by Membrane Introduction Mass Spectrometry

Autor:	Lisa E. Townsend, M. E. Cisper, P. H. Hemberger, Chris G. Gill
Rok vydání:	1995
Předmět:	chemistry.chemical_compound Chromatography chemistry Calibration curve Parts-per notation Analytical chemistry Membrane-introduction mass spectrometry Ion trap Benzene Mass spectrometry Trichloroethane Toluene Analytical Chemistry
Zdroj:	Analytical Chemistry. 67:1413-1417
ISSN:	1520-6882 0003-2700
DOI:	10.1021/ac00104a017
Popis:	We describe the use of a two-stage membrane sampling system coupled with an ion trap spectrometer for the direct analysis of volatile organic compounds in air with quantitation limits to low parts-per-billion levels and detection to parts-per-trillion levels. Toluene, carbon tetrachloride, trichloroethane, and benzene were used in these studies. We have obtained linear calibration curves from approximately 3 to 3000 ppb by volume for these compounds. The magnitude of instrument response is essentially independent of air flow rate from 0.2 to >3 L/min; response times are 60-90 s. Additionally, the same membrane interface can be used for the sequential analysis of water and soil, providing a sensitive and versatile analytical tool. 22 refs., 5 figs., 1 tab.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f29a87d45acecef251010837c741d35 https://doi.org/10.1021/ac00104a017 Zobrazit plný text záznamu