Screening Volatile Organics by Direct Sampling Ion Trap and Glow Discharge Mass Spectrometry.
Wise-MB; Hurst-GB; Thompson-CV; Buchanan-MV; Guerin-MR
NIOSH 1991 Feb:273-288
The use of an ion trap mass spectrometer and a tandem source glow discharge mass spectrometer for the direct measurement of parts per billion (ppb) levels of volatile organics in air, water, and soil samples was described. The response time was virtually instantaneous because the instruments did not rely on chromatographic separation prior to admitting a sample into the mass spectrometer. Accurate quantification of target analytes was accomplished in less than 2 minutes. The ion trap mass spectrometer has the capability of selective ion storage and multiple stages of collision induced dissociation for much greater specificity, even though the tandem source quadrupole mass spectrometer is somewhat limited in its ability to handle complex samples. Detection limits for both the tandem source quadrupole mass spectrometer and the ion trap mass spectrometer were generally in the range of 5 to 200ppb for water and soil samples without any sample preparation or preconcentration. The detection limits for volatile organics in air using the ITS range from about 1 to 45ppb for the 31 volatiles studied were about 1,000 times lower than the threshold limit values for these compounds.
Analytical-chemistry; Chemical-analysis; Spectrographic-analysis; Water-analysis; Soil-analysis; Organic-compounds; Environmental-pollution; Air-quality-monitoring;
Field Screening Methods for Hazardous Wastes and Toxic Chemicals. Second International Symposium, February 12-14, 1991. Sponsored by U.S. EPA; U.S. DOE; U.S. Army Toxic and Hazardous Materials Agency; U.S. Army Chemical Research Development and Engineering Center; U.S.A.F.; Florida State Univ.; National Environmental Technology Applications Corp.; and NIOSH