Journal
ANALYTICAL CHEMISTRY
Volume 81, Issue 17, Pages 7288-7293Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ac901088f
Keywords
-
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
Ask authors/readers for more resources
Atmospheric pressure chemical ionization-tandem mass spectrometry (APCI-MS/MS) was applied for the first time to the direct analysis of octamethylcyclotetrasiloxane (W) and decamethylcyclopentdsiloxane (D5) in gaseous matrixes without extraction or prior chromatographic separation. Mass spectrometric characteristics of both compounds under APCI conditions and their fragmentation behavior in MS/MS were investigated. Unlike the classical gas chromatography/mass spectrometry (GC/MS), which involves solvent extraction before gas chromatography, the proposed approach prevents contamination from GC system components and provides unambiguous structural assignments. The method performs well achieving good linearity (R(2) > 0.997), low limits of detection (4-6 mu g/m(3)), good precision (RSD < 1.0%) and accuracy (>93%), and a wide dynamic range. Its applicability to real-world samples was evaluated through measurements of D4 and D5 concentrations in air and biogas ne high sensitivity, selectivity, and reliability of this method render our approach a good alternative to the commonly used GC/MS method.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available