Embed Size (px)
Citation preview
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.
Detection of Volatile Organic Compounds in Odors from Plastics Using the zNose®
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Production of plastic worldwide is multiplying each year due to its
increasing demand.
The production of plastic in 2014 was 4% higher than the previous year’s.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Harmful VOCs in Plastics Could Lead to:
VOCs in Plastic
Cancer
Weak Immune System,
Kidneys, and other Organs
Respiratory
problems
NauseaDizziness
Fatigue
Headaches
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Introducing…zNose®
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
How the zNose® Quantifies the Chemistry of Odors?
Odor is first sampled and organic vapors collected on the trap.
Then, the trap is switched into the helium section where the collected organic compounds are injected into the helium gas.
The organic compounds pass through a capillary column with different velocities and thus individual chemicals exit the column at characteristic times.
As they exit the column they are detected and quantified by a solid state detector.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Sampling Vapors from Plastics at Room Temperature:
Four plastic rods, were separated into two groups (Sample 1 & 2) of two rods each.
Sample 2 produced a distinctive and unpleasant odor, while sample 1 produced only a very slight odor.
Odors from each of the four rods were measured by sampling vial headspace vapors.
Sampling removed approximately 10 milliliters air from the 40 mL vial.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Sample 1 produced only 4 distinct chemicals, while sample 2 produced 8, at much higher concentration measured in peak area.
Results:
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Testing Sample Vapors at Higher Temperature:
A vial heater was used to maintain a vial temperature of 60° C.
Sample vial temperature was maintained for 10 minutes prior to sampling headspace vapors with the zNose®.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
• Sample 1 produced only 6 distinct chemicals, while sample 2 produced 9, at much higher
concentration measured in peak area.
• The presence of additional chemicals in Sample 2 were responsible for the distinctive odor of
sample 2 plastics.
Results:
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
The derivative of odor intensity yields chromatograms which can be overlaid for more
detailed comparisons. The odor producing chemicals in sample 2 can clearly be seen in
the chromatogram below.
Comparing Olfactory Images:
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Email us at:
Contact us
We are keen to tell you more about EST zNOSE®
