The zNose and Black Powder A New Analytical Tool for Forensic Investigations

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The zNose and Black Powder A New Analytical
Tool for Forensic Investigations
Benchtop
Handheld
The zNose is designed to increase speed,
productivity, precision, and accuracy in forensic
investigations involving chemical analysis of
odors, smells, or chemical vapors. 1.
Principal Chemical Components 2. Olfactory
Images 3. Trace Analysis at ppt levels 4.
Sensory Perception
The zNose smells everything and misses nothing.
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Good Links on Black Powder Chemistry
http//www.elephantblackpowder.com/monk01.html
When the formula for black powder is shown as a
chemical equation the charcoal ingredient will be
shown as pure carbon, or C. In actuallity you
would not want to make a black powder using pure
carbon.
Charcoal rich in "volatiles" (creosote)
Cellulose is considered to be a "high-polymer" of
sugar. Sugar molecules form long chains which
form the basic units of structure in the
cellulose. The number of sugar units forming a
unit of structure in cellulose may vary from a
few thousand to over one million.
http//www.elephantblackpowder.com/monk04.html
There are presently three different brands of
black powder on the American market. Each has its
own particular chemical mixture "signature" based
on the sources of the raw materials used, in
addition to physical differences between the 3
brands prior to powder combustion
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Goex Black Powder (1f)
RED is response from standard alkane perfume
c13
c14
c12
c11
c10
c9
c8
http//www.goexpowder.com/black_powder.html
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Lidu Chinese black powder (3f)
Overlay of Goex Black Powder
Notes on Chinese Black Powder The first
container brought into the U.S. in 1999 was
fireworks lifting charge powder made by Lidu in
China. Huge grain size. Pistol velocities in
rifles. Burned clean because it was still burning
when it was ejected out the muzzle. Look like a
willie peter going off in front of the gun.The
Chinese do not use wheel mills. They can make
only a musket burn rate powder.
http//www.premierpyro.com/display.html
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Dupont Black Powder (2f)
Between 1802 and 1880, black powder was the sole
product manufactured at DuPont
In the early 70's E. I. DuPont withdrew from the
manufacture of black powder, and the Belin plant
eventually became part of GOEX Inc
http//www.chemheritage.org/HistoricalServices/emi
nentchemists/EIduPont/eidupont.htm
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Comparing three types of black powder
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Detailed Comparison
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VaporPrint Olfactory Images allow Visual
Recognition
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A New Technology Ultra Fast Gas Chromatography
and Surface Acoustic Wave Crystal Detectors

• Hydrocarbon Spectrum Analyzer C4-C30
• 10 Second Analysis Time
• Integrated Vapor Preconcentrator
• Electronically Variable Sensitivity
• Universal Selectivity (all seeing)

Simple 2-Step Process
Analyze
Sample

• ppb sensitivity C4-C12
• ppt sensitivity gtC12
• lt1 minute Cycle Time
• Long Term Stability
• Solid State Detector