THE USE OF BIOSENSORS IN FOOD INDUSTRY

W.A.G.E.WijelathAG/12/FT/024

Department of Food Science and Technology,Faculty of agriculture,

University of Peradeniya.

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BFST-2102 SEMINAR IN FOOD SCIENCE AND TECHNOLOGY

Content

1.What is a biosensor

2.History of biosensors

3.Principle of the biosensor

4.The biosensor system

5.Classification of biosensor

6.Typical biosensor system

7.Applications in Food Industry

8.Features of biosensors used in the food industry

9.Trending Biosensors

10.Biosensors in Dairy Industry

11.Biosensors for pathogen detection

12.Biosensors in Nano Scale 2

What Is a Biosensor ?

Definition:

Self-contained integrated device that is capable of providing specific qualitative or semi qualitative analytical information using a biological recognition element which is in direct spatial contact with a transduction element. (IUPAC,1998)

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History of Biosensors

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Father of biosensors, Leyland C. Clark invented the clark oxygen electrode, a pivotal device that allows real-time monitoring of patient’s blood oxygen levels and has made surgery safer and more successful for millions around the world.

The Principal of Biosensors

• It is a sensing device comprised of a specific biological element and a transducer.

• A “specific biological element” called bio-receptor recognizes a specific analyte and changes in the biomolecule are usually converted into an electrical signal by a transducer.

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The Biosensor System

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The Biosensor System: Bioreceptor

• A biologically derived material that interacts (binds or recognizes) the analyte.

• Types:

Nucleic acid

Enzyme

Antibody

Microorganism 7

The Biosensor System: Transducer

• A transducer is a device that converts one type of energy to another.

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Classification of biosensors

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A Typical Biosensor

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Applications in Food Industry

• Detection of heavy metals

• Detection of residual agrochemicals

• Detection of toxic metabolites

• Food borne pathogen detection

• Assure food safety

• As indicators of product acceptability

• Detection of unpermitted chemicals

• Sensory analysis 11

Features of biosensors used in the food industry

• Target specificity

• Electronic integration

• Small size

• Fast response time

• Stability

• Mass producible

• Continuous signal12

Trending BiosensorsE- nose •Detection of odd volatile compounds

•Application in Tea, Wine, Coffee and spices industry

E- Tongue

•A colorimetric sensor array is used

•Application in liquid food industry 13

Biosensors in Dairy Industry

• DNA testing of the cows

• Pathogen testing in the milk

• Micro-organism identification in the milk

• Test for preservation and pasteurization

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Biosensors for pathogen detection

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Biosensors in Nano Scale

• Embedded in food packages

• NEMS

• Integrated in e- noses

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Summary • Biosensors are based on use of biological

material as the sensing element which reacts or interacts with the analyte resulting in a detectable chemical or physical change.

• The inherent specificity, sensitivity and adaptability make them ideal candidate for use throughout the food industry.

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References

1) Murugaboopathi G., Parthasarathy V., Chellaram C., Anand T.P., and Vinurajkumar s.(2013) Applications of Biosensors in Food Industry. Biosciences Biotechnology Research Asia. 10(2), 707-711.

2) Sharma H., Agarwal M., Goswami M., Sharma A., Roy S.K., Rai S., and Murugan M.S.(2013) Biosensors: tool for food borne pathogen detection. Veterinary World. 6(12), 968-973.

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Thank you!

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