This work could be helpful for the rapid and on-site detection of illegal cooking oil. Their work, entitled "Rapid colorimetric detection of illegal cooking oils based on phase transfer technology", will be published on SCIENCE CHINA Chemistry, 2013i7j.
The illegal cooking oil includes the refining of the waste oil from restaurant, the repeatedly used oil and the waste animal fats. Because illegal cooking oil may contain toxic polymer, peroxide and so on, is dangerous to human health. The most common clinical symptoms of poisoning include headache, vomiting and diarrhea abdominal pain. Recently years, because the illegal cooking oil inflows into the family kitchens, it led to the serious food safety risks in China. The administration from the government such as monitoring the purchase records and granting the administrative license can be used to control the problem of illegal cooking oil; however the rapid and on-site detection of illegal cooking oil is still necessary and urgent.Professor HE Yujian, associate professor ZHAO Hong, doctoral students YUAN Longfei and ZHOU Ying et al., from University of Chinese Academy of Sciences establish two rapid and convenient colorimetric detections of illegal cooking oils based on phase transfer technology. The copper ions and the cationic gold nanoparticles protected by poly (diallyl dimethylammonium) chloride (PDDA) were used as the recognition probes. And the illegal cooking oil could be detected by naked-eye (as shown in the Figure 1). The results showed that qualified cooking oil mixed with 2.8% of the illegal cooking oil could be detected, and more than 5% of the illegal cooking oil could be accurately detected by naked-eye. These methods were applied in blind test for total of 235 samples; the results showed that the accurate rates of the blind tests were 95.7%.
In addition, Professor HE Yujian and his group have established various detections of illegal cooking oils based on NMR, GC, HPLC and MALDI-TOF-MS technology since 2012. These works have been published in professional journal of analytical chemistry and applied for national patents.
See the article:
YUAN L F, ZHOU Y, HE P, CAI B T, XU X L, LIU Q J, ZHONG W K, LI Q L, ZHAO H, HE Y J. Rapid colorimetric detection of illegal cooking oils based on phase transfer technology. SCIENCE CHINA Chemistry, 2013i7j, doi: 10.1360/032012-459
HE Yujian | EurekAlert!
Research team creates new possibilities for medicine and materials sciences
22.01.2018 | Humboldt-Universität zu Berlin
Saarland University bioinformaticians compute gene sequences inherited from each parent
22.01.2018 | Universität des Saarlandes
On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.
We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...
What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
08.01.2018 | Event News
11.12.2017 | Event News
08.12.2017 | Event News
22.01.2018 | Materials Sciences
22.01.2018 | Earth Sciences
22.01.2018 | Life Sciences