Job offersmore »
- Purchasing Specialist Exoten - Netherlands
- Intercompany Key Account Manager Exoten - Netherlands
- Buitendienst Medewerker - Oost Nederland
- Managing Grower - Australia
- Senior Grower - Talbotville, Ontario, Canada
- Operations Manager - Fresh Produce
- Senior Account Manager Retail - Netherlands
- Supply Allocation and Inventory Manager - Fresh Produce, Italy
- Senior Grower - Katunga, Australia
- Key Account Manager - Netherlands
Top 5 - yesterday
Top 5 - last week
Top 5 - last month
- OVERVIEW GLOBAL AVOCADO MARKET
- Costa Rica: Government accused of ignoring organic pineapple issue
- Organic food consumption continues to increase in Europe
- California grape grower-shipper publishes first Corporate Social Responsibly Report
- Spain: About 20,000 tonnes of stone fruit damaged by frost in Murcia
Exchange ratesmore »
Detecting pesticide residues quicker and more efficiently
University of Singapore: Nanoparticles used for pesticide screeningPreviously undetectable traces of a common vegetable pesticide have been extracted by local researchers using a new screening technique. They are using a new method, making use of tiny nanoparticles to grab molecules of pyrethroids, a group of synthetic pesticides that are used to protect crops from insects.
The new method is 10 times more sensitive than conventional methods and can detect concentrations of the pesticide of as low as 0.02 nanograms in vegetables.
Food scientist with the National University of Singapore, Yang Hongshun, claims consumers are more and more concerned about chemicals in their food, always wanting to be informed about traces of pesticides - even if they are within the safety limits.
Yang, who is with the NUS Food Science and Technology Programme says, “This method can be used by food safety authorities to check the authenticity of 'pesticide-free' claims.”
His team studied the use of nanoparticles to detect traces of the pesticide in vegetable oil and 10 types of vegetables, such as lettuce. After blending the vegetable samples, the liquid portion of the mixture was extracted and mixed with the nanoparticles.
According to an article by straitstimes.com, the new method is also able to screen for pesticides in a given sample three times faster, as the nanoparticles are designed to zoom in on a particular molecule. Conventional methods of detection, such as through column filtration, are less specific and more time consuming.
Next, the team is looking at designing nanoparticles that can home in on other molecules, including toxins produced by fungus, said PhD student Yu Xi, who was also involved in the research. The team is currently in talks with vegetable farmers, distributors and a food safety facility on commercialising the technique.
Publication date: 2/21/2018
Receive the daily newsletter in your email for free | Click here
Other news in this sector: