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Varian CP-3800 GC
sample introduction: 1079 splitless and 1177 split-splitless injectors, combipal autosampler
analyses of polar and non-polar analytes
sub-ambient temperature, cryogenic GC for analyses of very volatile cmpds
sampling of, for example, O2 content in sludge or O2 solubility in fluoroalkane
headspace analyses - for determination of air-water partitioning, liquid vapour pressures
headspace prepartion station with agitation and heat
large range of working temperatures
Solid Phase Microextraction (SPME) – for determination of KOW, KOA, KAW, vapour pressures
Chromatoprobe – for determination of Kair-solid , KOA
allows direct injection of sludge or other “dirty” samples into the device and measure of degassing of volatiles directly at variable temperatures
ECD and MS detection
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Varian 4000 Ion Trap MS
Mass range: 10-1000u in 0.1u steps;
scan range is time programmable throughout the run;
n Mass resolution: unit mass resolution;
n Scan rate: 5000-10000 u/sec;
n Mass axis stability: ± 0.1u over 72 hr
Scan Modes:
Time programmable: in all modes during the analytical run;
n Full scan;
n Selected Ion Storage (SIS): stores up to six ranges of ions;
n MS/MS: using non-resonant or frequency modulated resonant CID
Ionization:
Electron impact ionization;
Positive and negative chemical ionization with gaseous or liquid CI reagents;
Internal and external ionization sources
Mass Specrometry techniques including:
MSn, SIS, SRM
Detection:
Detector: off-axis design, ± 10 kV HED and electron multiplier
n Linear dynamic range: 103 to 104, compound-dependent based upon mode of operation and analytical methods
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Varian 3600 FT-IR
Cryogenically cooled, MCT high sensitivity detector
Long path IR gas cell
Maximum pathlength greater than 16m
High throughput
Used to determine (examples):
Vapour pressure
Air-water partitioning – e.g. cloud interior conditions
Atmospheric chemistry reactions
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