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:
*Name:
*Comment:
*Email:


(Date:7/26/2017)... ... July 26, 2017 , ... Team Type 1 Foundation, a nonprofit organization ... affected by diabetes, is excited to announce the 106 college athletes with type 1 ... Established in 2005, the Team Type 1 Foundation has bestowed a total of 271 ...
(Date:7/26/2017)... ... July 26, 2017 , ... A global ... in Jupiter. The state of the art center will provide advanced surgical ... a goal of providing heart patients longer lives. , North American Veterinary Heart ...
(Date:7/26/2017)... (PRWEB) , ... July 26, 2017 , ... ... “Company” or “Isodiol”) a global cannabis innovator, specializing in the development of pharmaceutical ... period from April 1, 2017 to June 30, 2017. Iso International LLC recorded ...
(Date:7/26/2017)... ... 26, 2017 , ... Wendy M. Musielak, a partner at the Andrew Cores Family ... Bar Association’s third Vice President earlier this year. She will serve the membership in this ... Vice President, in accordance with the organization’s by-laws. , Musielak joined the ...
(Date:7/26/2017)... ... July 26, 2017 , ... The number of adults 65 years ... but ways to improve asthma control in the population are not well described. In ... In Practice), an official journal of the American Academy of Allergy, Asthma & Immunology ...
Breaking Medicine News(10 mins):
(Date:7/13/2017)... , July 13, 2017 RK Logistics Group, Inc. ... Pharmacy certification for its Fremont, CA ... in the Tri-Valley and San Jose ... City of Fremont , with its Fremont Innovation District, ... provide such a powerful resource to the hundreds of biotech, ...
(Date:7/11/2017)... 2017 Zymo Research Corp., also known as ,The Epigenetics Company, ... aging in a precise manner using the myDNAge ™ test. Based ... professor of human genetics and biostatistics at the David Geffen School ... , Zymo Research,s proprietary DNAge ™ technology is used to analyze ... ...
(Date:7/11/2017)... Echenberg, founder of Echenberg Institute, is announcing a new safe and effective ... intercourse and other painful pelvic pain conditions such as pelvic floor dysfunction, ... ... ... -based start-up company, VuVatech LLC, fills a void in the women,s wellness ...
Breaking Medicine Technology: