detection of phenol in water and air using the znose®
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www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Detection of Phenol in Waterand Air Using the zNose®
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Phenol is an aromatic organic compound. It is an important industrial commodity that acts as a versatile precursor to a large collection of drugs. Phenol can have toxic effect on the health of humans and animals alike. Exposure to phenol can cause systemic poisoning and also adversely affect the respiratory tracts.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
Introducing…zNose®
It is difficult to quantify the chemistry of aromas because of the overlapping responses and physical instability
A new type of electronic nose, that can perform analytical measurements of volatile organic vapors and odors in near real time with part-per-trillion sensitivity.
www.estcal.comwww.estcal.comElectronic Sensor Technology, Inc.
• Standard phenol vapor is created by injecting 10 μL of standard solution (147.5 ng) into a 250 mL bottle.
• A side-ported sampling needle is used to test 3.17 mL vapor samples. The samples are replicated for accuracy.
• The minimum vapor detection limit for phenol was 3.25 nanograms/liter using zNose® .
Detecting Phenol in Air
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• Headspace vapors are created and tested directly using s side-ported needle.
• Concentration of phenol vapors is low at room temperature. Water is heated using a two-zone, top and bottom, vial heater accessory.
• zNose® detects 0.250 ppb headspace vapors at room temperature. 100ppb is detected when the temperature is raised to 40oC.
Detecting Phenol in Water
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• Concentrated vapors in the tenax of the SlickStick® is desorbed and collected by the internal trap of the zNose®. (Figure 15)
• The desorbing temperature is raised to 200oC by the software program.
• The minimum detection level for phenol in water is was 10 ppb.
Detecting Phenol in Water Using SlickStick® Accessory
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