TITLE

Rapid analysis of aromatic contaminants in water samples by means of laser ionization mass spectrometry

AUTHOR(S)
Globig, Daniel; Weickhardt, Christian
PUB. DATE
December 2003
SOURCE
Analytical & Bioanalytical Chemistry;Dec2003, Vol. 377 Issue 7/8, p1124
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Three different approaches to laser ionization mass spectrometric analysis of aromatic compounds in water samples are described and their performances are compared. Whereas the first two methods are based on direct laser desorption and subsequent laser ionization of either frozen or adsorbed samples in a time-of-flight mass analyzer, the third performs laser ionization in a quadrupole ion-trap into which the sample is transferred from a GC injector via a short piece of capillary tubing. For the laser-desorption method a detection limit in the 100 µg L-1 range was determined for fluorene in frozen samples. The easier to handle analysis of adsorbed samples yielded sensitivities which were lower by about two orders of magnitude. As both direct techniques do not reach the sensitivity required for ultra trace analysis in water a preconcentration step in form of solid-phase microextraction was added before measurement using the laser ionization quadrupole ion-trap mass spectrometer. Sensitivity in the desired ng L-1 range was easily achieved.
ACCESSION #
15124821

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics