GAS BreathSpec, User Manual

Page: 33 / 242

BreathSpec®
– User Manual
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5.2 Purpose of the device
The BreathSpec® represents the synergies of a fast gas chromatograph and the
outstanding sensitivity of an IMS. Thus, traces of Volatile Organic Compounds (VOCs)
even in highly humid matrices like the human breath become detectable without any
special sample preparation. Its intended purpose is to:
Measure traces of volatile organic compounds in exhaled air of humans.
The device allows sampling of human breath directly by sucking in breath exhaled in a
handheld breath sampler. The handheld sampler is equipped with disposable
mouthpiece, sampling tube and sampling tip to minimize possible carry over of
microbes. Furthermore, the device can be equipped with a Luer port to accept samples
collected breath in a common disposable syringe. Sampling into a syringe - adside
from the device. -. can be done using a full disposable breath sampling setup.
Results are available within a few minutes and compounds are typically detectable
even at ppbv-/pptv-levels. The technical configuration, its menu as well as its extremely
easy.
WARNING!
The BreathSpec® device must not be operated by introducing
aggressive gases or any kind of liquids or solids. The operational
reliability is only ensured when the equipment is applied for this
intended purpose.
INFORMATION!
Any use of the device, that differs from the intended purpose will be
regarded as “out of purpose”. Any claims of any kind against G.A.S.
or her associates that are related to damages from a use not covered
by the aforesaid will be rejected.
The BreathSpec® contains several parameterized components that can be modified
for optimizing measurement data in terms of separability of substances and clarity of
resulting peaks.
The BreathSpec® can be operated in negative or positive drift voltage mode. The
reactant ion peaks (RIPs) and analyte ion peaks (AIPs) in the positive drift voltage
mode will be displayed as maxima in the spectra. In the negative drift voltage mode
both will be shown as minima. One of these modes may be more suitable for specific
substances.