Different oils show different Raman spectra ■ Raman spectroscopy principle, nanotechnology ■ Size equivalent to 15 inch laptop bag, weighing 10 kg ■ Can be detected at any time, anywhere, within ten minutes we can see the test results of the test of waste oil The room can not only “pick up” but also overcome the problems of the long time for the inspection of edible oil quality. The test results can be known within ten minutes. On July 13th, Optus (Suzhou) Optical Nanotechnology Co., Ltd. announced that the company has completed the laboratory R&D of the first domestic “Trench Oil Testing Laboratory” and will realize industrial production in the near future. This marks the successful development of the first domestic waste oil testing portable laboratory in Su.

Drain oil is known to the human body, but the reporter learned that there are certain technical problems in the rapid detection of waste oil, for example, the detection needs to use the laboratory, and it usually takes 2 to 3 days to know the test results, which has become the relevant departments A major problem in monitoring the flow of cooking oil into the dining table. The company successfully developed a "drainage oil testing portable laboratory" and took the lead in the country to overcome the technical difficulties of rapid detection of edible oil.

A reporter of the portable laboratory for the detection of waste oil saw the size of a portable laboratory equivalent to a 15-inch laptop bag weighing about 10 kilograms. The portable laboratory was opened, and there was a computer and a laser Raman spectrometer connected to it. According to Liu Chunwei, general manager of the company, the portable laboratory can carry out waste oil testing anytime and anywhere. The built-in power supply can work for 5 hours continuously. The operation is very simple. Just take the laser probe and take a look at the oil in the transparent container. The portable laboratory's computer will display the test results: the green light is on to indicate that the oil is safe; the red light is on, indicating that the oil contains waste oil. ingredient. "The refining or blending of waste oil can be confusing from the outside, but the portable laboratory still allows it to appear in its original form." According to Liu Chunwei, the waste oil is usually referred to as swill oil, poor quality lard, and fried old oil. After “deep” treatment such as high-temperature refining, decolorization, and deodorization, the appearance of waste oil and common edible oil is almost indistinguishable. However, due to the production of raw materials and high-temperature treatment, the waste oil generally contains “animal fat” or “oxidation substances”. Exceeding the two major characteristics, and this precisely provides a solid basis for the portable laboratory to "trick" the murderer.

According to reports, the portable laboratory mainly uses the principle of laser Raman spectroscopy and nanotechnology. When the laser irradiates the oil to be inspected, the Raman spectrum formed can be transmitted back to the computer in time, due to the Raman spectra of different molecular structures and human fingerprints. The same uniqueness, so the computer through Raman spectral comparison, can clearly show whether the measured oil contains waste oil. Nanotechnology plays a major role as a signal amplifier in hand-held laboratories. It can help lasers capture microscopic traces of chemically very weak signals and amplify them, thus increasing detection sensitivity.

Background information: Each Raman spectrum is scattered by light to form different Raman spectra. This spectrum is unique as a human fingerprint. Therefore, one can determine different substances based on the comparison of Raman spectra. The earliest discovered Raman spectra was Indian scientist C. V. Raman, and therefore won the 1930 Nobel Prize in physics. At present, Raman spectroscopy has been widely used in chemistry, physics, biology and medicine.