ON-SITE ENVIRONMENTAL-ANALYSIS BY MEMBRANE INLET MASS-SPECTROMETRY

Citation
Vt. Virkki et al., ON-SITE ENVIRONMENTAL-ANALYSIS BY MEMBRANE INLET MASS-SPECTROMETRY, Analytical chemistry, 67(8), 1995, pp. 1421-1425
Citations number
16
Categorie Soggetti
Chemistry Analytical
Journal title
ISSN journal
00032700
Volume
67
Issue
8
Year of publication
1995
Pages
1421 - 1425
Database
ISI
SICI code
0003-2700(1995)67:8<1421:OEBMIM>2.0.ZU;2-Y
Abstract
A membrane inlet mass spectrometric method for on-site environmental a nalysis in an advanced mobile analytical laboratory has been developed , A helium purge type of membrane inlet was used as a basis for the de velopment of the method since it can be used in the GC/MS instrument a vailable in the project without any modifications of the mass spectrom eter. The custom-built membrane inlet can also be easily used with oth er types of quadrupole instruments. Results obtained show that many en vironmentally significant compounds can be measured directly from wate r samples at sub-parts-per-billion levels with response times of 1-2 m in. The membrane inlet characterization studies show also that linear dynamic ranges of at least 4 orders of magnitude can be achieved, On-s ite analysis of contaminated groundwater samples shows that membrane i nlet mass spectrometry (MIMS) is an excellent rapid analysis method fo r identification of pollutants. In addition, MIMS was shown to be a ve ry good quantitation method over a wide concentration range, For examp le, a toluene concentration of 58 ppm and a trichloroethene concentrat ion of 30 ppb were measured in one of the samples analyzed.