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Electronic nose

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  • 1. ELECTRONIC NOSE
  • 2. Introduction • An electronic device intended to detect odours and flavours • Use sensor arrays and pattern recognition systems. • Used for identification ,comparison and quantification • Used to fulfill industrial needs .
  • 3. Working Principle Electronic Nose comprises mainly three parts: 1. A sample delivery System 2. A detection System 3. A computing System
  • 4. Sample Delivery System • Enables generation of a sample which is to be analyze. • Then it is injected to detection system.
  • 5. Detection System • Contains a group of sensors to sense the compound • Sensors react to the compound and the response is recorded by an electronic interface. • Transforms signal into digital value.
  • 6. Computing System • It combines the responses of all sensors to produce a result. • These results can be easily analyzed with a database of qualified samples. • New samples are identified by comparing those with the samples in database.
  • 7. Application  In Quality Control Laboratories  Conformity of raw materials and final products  Detection of contamination , spoilage and adulteration.  Origin or vendor selection.  Monitoring the storage condition.
  • 8. Possible and future application in the field of health and security.  Detection of dangerous and harmful bacteria which may lead to contamination of other patients.  Detection of lung cancer or other diseases by detecting volatile organic compounds  To detect bacterial or insect contamination of food materials.  Nasal implants to those who has weak sense of smell  The brain Mapping Foundation used e-nose to find brain cancer
  • 9. Possible and future applications in the field of crime prevention and security.  Can use e-nose to detect odourless chemicals like natural gas  to detect drug odours despite other airborne odours capable of confusing police dogs.  It may also be used as a bomb detection method in airports.
  • 10. In environmental monitoring  For identification of volatile organic compounds in air, water and soil samples.  For environmental protection.
  • 11. Example of Electronic Nose • The Cyranose 320 is a handheld “electronic nose” developed by Cyrano Sciences of Pasadena, California in 2000. Cyrano Sciences was founded in 1997, 9 years after the concept of an “electronic nose” based on using multiple semi-selective sensors combined with electronic computation was first proposed by Gardner and Bartlett.The Cyranose 320 is based on sensor research performed by Professor Nathan Lewis of the California Institute of Technology.Applications researched using the Cyranose 320 include the detection of COPD, and other medical conditionsas well as industrial applications generally related to quality control or contamination detection. • Chronic obstructive pulmonary disease (COPD) is an umbrella term for people with chronic bronchitis, emphysema or both.