Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Rapid colorimetric detection technology enables illegal cooking oils with no place to hide

01.07.2013
In recent years, illegal cooking oil incident led to the serious food safety risks and the negative social repercussions. Professor HE Yujian and his group from College of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences establish two rapid and convenient colorimetric detections of illegal cooking oils based on phase transfer technology.

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, 2013i7j.

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%.

Compared with the traditional methods, this method is a cost-effective process, and allowed rapid and simple colorimetric detection of illegal cooking oils without omplex pre-treatment. The work could provide beneficial methods for the rapid on-site detection of illegal cooking oil. It has a favorable application potential in civilian fields because of its high accuracy, simple and low cost. These research findings have applied for national patent.

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, 2013i7j, doi: 10.1360/032012-459

http://chem.scichina.com:8081/sciB/CN/abstract/abstract510311.shtml

Science China Press Co., Ltd. (SCP) is a scientific journal publishing company of the Chinese Academy of Sciences (CAS). For 50 years, SCP takes its mission to present to the world the best achievements by Chinese scientists on various fields of natural sciences researches.

HE Yujian | EurekAlert!
Further information:
http://www.scichina.com

More articles from Life Sciences:

nachricht Discovery of a Key Regulatory Gene in Cardiac Valve Formation
24.05.2017 | Universität Basel

nachricht Carcinogenic soot particles from GDI engines
24.05.2017 | Empa - Eidgenössische Materialprüfungs- und Forschungsanstalt

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>