With rising global warming, it is quintessential to monitor air, water and soil pollution. While traditional electronic noses have issues of overlap and sensitivity, zNose measures granular details of the pollution and comes with 6 added advantages. Read it on - http://www.estcal.com/industry_solutions/environmental.html The following slide deck explains how monitoring of air, water and soil can be done using zNose. While it tells about the traditional eNose it also informs us about the issues the traditional eNose face while monitoring which are: *Sometimes multiple sensors respond to the same vapor. *The vapor sample being tested must be shared among each sensor in the array. On the other hand, zNose carries a rapid gas chromatography (GC) and a new zero dead volume integrating GC detector. The slide also explains ways in which ESTInc's zNose can help in the remediation of air, water and soil. Results: *zNose delivered 10 second chromatogram using a patented (SAW) sensor. *It operates in both environments- ON field as well as in the lab. *Consists of a low cost GPS receiver for accurately recording the location of each measurement. 10 common VOCs are evaluated and the result is also shown in the deck.

1. Preventing Air, Water
& Soil Pollution with
zNose®
Electronic Sensor Technology, Inc. www.estcal.com

2. Preventing Air, Water
& Soil Pollution with
zNose®
Electronic Sensor Technology, Inc. www.estcal.com

3. Where are we Heading?
Electronic Sensor Technology, Inc. www.estcal.com

4. Where are we Heading?
Electronic Sensor Technology, Inc. www.estcal.com

5. ….. Is technology like Electronic Nose, help in
regular monitoring of air pollutants and keeping
the environmental pollution in check.
Electronic Sensor Technology, Inc. www.estcal.com
The need of the Hour…
An Electronic Nose is a vapor analyzer, which provides a recognizable image of specific
vapor mixtures (fragrances) containing possibly hundreds of different chemicalspecies.
Read about zNose® in detail here.

6. 2 key issues with Traditional Electronic Nose
Electronic Sensor Technology, Inc. www.estcal.com
Overlap -
Sometimes multiple
sensors respond to
the same vapor
Sensitivity - the vapor
sample being tested by the
array must be shared among
each sensor in the array
The first U.S. EPA electronic nose concept has not come from a sensor array but rather
from a very fast gas chromatograph (GC) and a new zero dead volume integrating GC
detector, called the zNose® by Electronic Sensor Technology.

7. zNose®: GC/SAW electronic nose system
It measures,
individual analyte
peak half-width in
milliseconds.
Every picogram of
material is
collected on a
temperature-
controlled quartz
crystal.
The surface of the
quartz crystal also
is host to a high Q
surface acoustic
wave (SAW)
interferometer.
The SAW resonator
produces a
frequency
proportional to the
amount of column
effluent deposited
on the quartz
surface.
It derives pattern
recognition and a
visual fragrance
pattern, called a
VaporPrint™ from
the frequency of
the SAW
resonator.
A VaporPrint™
image allows a
complex ambient
environment to be
viewed and
recognized.
Electronic Sensor Technology, Inc. www.estcal.com
Read about zNose® in detail here.

8. Environmental Pollution Remediation
Air Pollution
•Air pollution and many different types of odors are common pollutants which require monitoring and
quantification.
•The exhaust from automobiles and trucks is an important application.
Water Pollution
•Water pollution occurs where there are leaking fuel tanks or where spills have occurred and organics
have entered the aquifers.
•Water pollution associated with rivers, lakes, and water aquifers represents approximately 60% of the
world environmental problems
•The pollutants in water are volatile, water pollution can be measured simply by testing the headspace
vapors above the water
Soil Pollution
•The nose is configured to detect semi-volatile compounds like pesticides, PCBs, and dioxins in soil.
•Using direct desorbtion or liquid extraction techniques with soil based upon EPA methods provides
techniques for evaluating this type of soil contamination.
Read about Environmental Solutions offered under zNose®
Electronic Sensor Technology, Inc. www.estcal.com

9. The GC/SAW electronic nose participated in the program, that performed flash chromatography,
VaporPrint™ imaging, and configuration of custom sensor arrays with user defined alarm levels.
• zNose® delivered 10 second chromatograms using a patented Surface Acoustic Wave (SAW) sensor.
• It also operated in both the environments - on field as well as in the laboratory.
• A low-cost GPS receiver for accurately recording the location of each measurement was also integrated
as an option.
US EPA Environmental Technology Validation (ETV) program
Here’s how zNose® can
help in adhering to EPA
compliances for
environmental protection
Electronic Sensor Technology, Inc. www.estcal.com

10. US EPA Environmental Technology Validation (ETV) program
Key Observations:
The minimum detection levels for 10
common VOCs in air and water were
evaluated and the results were as
follows
Performance Validation -
The GC/SAW electronic
nose is the first to receive
validation from the US EPA
for environmental
monitoring of VOCs in
water and PCBs in soil.
Electronic Sensor Technology, Inc. www.estcal.com

11. Contact us
Electronic Sensor Technology, Inc. www.estcal.com
Email us at:
italib@estcal.com
We are keen to tell you more
about EST zNOSE®