The benefits of accurate mass measurements and GCxGC tool in environmental analysis
Dr. Albert Lebedev
Tuesday, June 20, 2017
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Chapters
Introduction
General statements
LECO PEGASUS GC-HRT
Modes of FFPTM Analyzer Operation
Snow layers(34 cm)
Cloud water samples
Targeted analysis
Integral mass spectrum of snow sample at m/z 252
Integral mass spectrum of snow sample at m/z 180
Extracted ion current plot based on the characteristic mass for naphthalenedicarboxylic acid vs the width of mass window
Non targeted analysis
3-Penten-2-one, 4-methyl-
Dimethyldibenzothiophene
Cyclopropane, 1-(4-methoxyphenyl)-2-phenyl-
Manual interpretation
Official US EPA GC/HRMS methods
The benefits of accurate mass measurements for the environmental analysis
GCxGC/MS
GC-GC-MS chromatogram of Solzavodsk soil sample(hydrocarbon fraction)
GCxGC Analysis of Deepwater Horizon Crude Oil
Three-dimensional TIC chromatogram
Three-dimensional chromatogram of the diesel oil sample
Three-dimensional chromatogram of the diesel oil sample after its aquatic chlorination with molecular chlorine
Two-dimensional mass-chromatogram of the diesel oil sample after its aquatic chlorination with molecular chlorine
Raw diesel-zoomed
Fuel diesel-zoomed
Formula
Two-dimensional (2D) contour plots of total ion chromatograms of MegaMix solution
A piece of total ion chromatogram of a snow sample Beliy Nos-1
Mass spectrum of peak 38
Best library hits for the mass spectrum of peak 38
Mass chromatograms (m/z 106 and m/z 120)
Separation of the coeluting peaks with GCxGC tool
Mass spectrum of a compound in Cloud 2 sample at RT
GCxGC mode allows separating these compounds
Mass spectrum of the first coeluting peak after GCxGC separation
Mass spectrum of the second coeluting peak after GCxGC separation
A piece of total ion chromatogram of a snow sample Beliy Nos-1
Mass spectrum of peak 63
Best library hits for the mass spectrum of peak 63
Separation of the coeluting peaks of GC peak 63 with GCxGC tool
Mass spectra of five coeluting compounds of GC peak 63 with GCxGC tool
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