Navigation Links
New Electro-chemical Biosensor to Check Food Contamination

Scientists have developed a new electro-chemical biosensor, which detects the presence of very small amounts of atrazine, one of the most widely used herbicides in agriculture and which also has very long lasting effects on the environment as well as antibiotics in food.

The biosensor is faster, more portable and economic than the expensive laboratory methods, which are used to detect contaminants, while having a very similar sensitivity. The system has been tested successfully to detect pesticides in samples of drinking water and commercial orange juice, as well as to detect traces of antibiotics in cow's milk.

The study was conducted by a team of researchers including Isabel Pividori at the Universitat Autnoma de Barcelona (UAB), in cooperation with the CSIC.

The chemical mechanism to detect contaminants in a sample is very similar to that used by the immune system to identify a virus or bacteria in the body. Specific antibodies for atrazine have been used (in the case of pesticides) and for sulphanilamide (in the case of identifying antibiotics).

Once the antibodies hook onto the contaminating particles they are attracted to the surface of a transductor, which converts the contact with the antibodies into electrical signals. By measuring these electric signals the device can determine the concentration of contaminants in the sample.

The sensor will allow the detection of doses of atrazine at levels of 0.006 micrograms per litre, much lower than the maximum concentrations allowed by European regulations (0.1 micrograms per litre), and this can be done more quickly and cheaply than is the case of the chromatographs, which are used today in food safety laboratories. As regards the detection of antibiotics, the sensor has a sensitivity of 1 microgram per litre for whole milk, while the legislation allows a maximum of 100 micrograms per litre.

Due to the ease of use of this sensor and its portability, the technique can be used in situ for quantitative analysis of the presence of atrazine, as well as that of other herbicides, in food and water samples outside the laboratory.

"Due to their characteristics, such as their ability to carry out measurements in the field, the biosensors are analytical tools which have numerous applications in the agro food industry, and can be used as an alarm for the rapid detection of 'risk' of contamination in practices based on Risk and Critical Control Point Analysis, Pividori said.

The findings of the study have been published in the journals Analytical Chemistry and Biosensors and Bioelectronics.


Related medicine news :

1. Biosensor chip to help drug development
2. Small Biosensor To Enable Cancer Detection
3. Biosensor Chips to detect Urinary Tract Infections
4. New Biosensor Developed To Detect E. Coli Bacteria
5. Check if your “Favourite medical web-site” is indulging in Quackey
6. A Drug That Can Keep Cancer In Check
7. Blood Pressure Checks To Be Done For Children As Young As Age 3
8. Patients With Alzheimer’s Need To Be Checked For Visual Clarit
9. Testing Your Health & Charging Your Mobile At One Go - Check Out The Urine Powered Batteries
10. Virus May Check Spread Of Bird Flu
11. Stents That Release Medication To Check Artery Narrowing
Post Your Comments:

(Date:10/13/2015)... (PRWEB) , ... October 13, 2015 , ... ... solution provider of IBM software products, introduced a new company, RightSensor™ LLC, an ... and data communications capability. RightSensor™ provides a fully-managed approach for customers requiring ...
(Date:10/13/2015)... , ... October 13, 2015 , ... Dr. Poneh Ghasri, ... New Today on September 18, 2015. The research, which was conducted at the Dental ... Sabbah and colleagues, show connections between stress during pregnancy and future dental health in ...
(Date:10/13/2015)... ... ... A child without a healthy mouth is much more likely to have an ... has joined with Global Dental Relief (GDR) to help bring dental care ... SmileCareClub will donate one clinic visit to a child in Kenya. , “When SmileCareClub ...
(Date:10/13/2015)... ... October 13, 2015 , ... Altec Products, Inc., the ... of Synergy 2015. The annual WennSoft KEY2ACT user conference will take place from ... unite customers, partners, WennSoft team members and sponsors to facilitate the sharing of ...
(Date:10/13/2015)... ... 13, 2015 , ... T-System and Centegra Health System, a ... department visits per year, today announced the successful and rapid deployment of EV™, ... and financial outcomes. , In less than four days, Centegra Hospitals ...
Breaking Medicine News(10 mins):
(Date:10/13/2015)... Calif. , Oct. 13, 2015  Asterias ... agreement with the UK-based Cell Therapy Catapult to ... AST-VAC2, Asterias, allogeneic dendritic cell immunotherapy. Under the ... scale manufacturing processes for AST-VAC2 to support advanced ... --> --> The ...
(Date:10/12/2015)... -- Use this report to: - Learn ... the medical membrane devices market. - Analyze the present ... medical membrane devices market including hemodialyzers, membrane oxygenators, intravenous ... devices. - Gain information on newly approved products, recalls ... Use this report to: - Learn about the performance, ...
(Date:10/12/2015)... Texas , Oct. 12, 2015  Luminex Corporation (NASDAQ: ... results for the third quarter ended September 30, 2015 on ... is scheduled for release after the close of trading. ... hold a conference call to discuss the operating highlights and ... on November 2, 2015, at 4:30 p.m. Eastern time. ...
Breaking Medicine Technology: