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www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Detection of Volatile Organic Compounds
in Odors from Plastics Using the zNose®
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Detecting 2,4,6 TCA in Corks & Wine
using zNose®
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
The production of plastic in 2014 was 4% higher than the previous year’s.
CORKINESS IN WINES
One of the main reasons for corkiness in wines
has been determined to be 2,4,6 –
Trichloroanisole (TCA) which smells like musty
old newspapers
TCA forms when the hydrocarbons
combine with chlorine, used to bleach the
corks before use.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Introducing…zNose®
Measuring ppt levels of TCA in wine is difficult as they simultaneously abundant
in wine with other compounds with part per million concentration levels.
The first electronic nose to achieve the same or better sensitivity to 2,4,6 TCA
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Detecting TCA in Wine using zNose®
A series of 10
neutral wine
solutions, identified
by an expert panel
obtaining TCA.
The aroma from
each sample was
tested to see if
zNose® can detect
TCA in the aroma of
the wine.
zNose® was able to
detect and
quantify the
amount of TCA in
each wine’s aroma
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Test result of detection of TCA in a neutral wine sample
Overlaid in red is the
response to a 1 ppb
TCA calibration
standard. The
presence of 85.5 ppt
TCA can clearly be
seen and as
expected was
above the odor
threshold (5-10) ppt
of the expert panel.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Calibration Results:
Calibration response obtained
by pre-concentrating 5mL
volume containing 500pg of
2,4,6 TCA per milliliter
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Offset waterfall display
showing repeatability
of 6 consecutive
measurements of a 40
milliliter vial containing
DCA, TCA and PCA
vapors.
Decrease in sign level is
due to removal of 5 –
milliliter volume with
each sample and test.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Email us at:
Contact us
italib@estcal.com
We are keen to tell you more
about EST zNOSE®

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Detecting 2,4,6 TCA in Corks & Wine using zNose