Ethanol-extraction SERS strategy provides highly sensitive detection of poisons in oily matrix

Ethanol-extraction SERS Strategy Provides Highly Sensitive Detection of Poisons in Oily Matrix
Schematic diagram of SERS detection based on ethanol extraction. Credit: WANG Yongtao

Scientists from the Chinese Academy of Sciences (CAS) recently developed an ethanol-extraction surface-enhanced Raman spectroscopy (SERS) strategy for highly sensitive detection of poisons in oily matrix.

The strategy, proposed by researchers led by Prof. Yang Liangbao at the Hefei Institutes of Physical Science of CAS, can lead to great improvement in the detection of substances in oily matrix.

In recent years, poisonings occurred frequently in oily matrix, but due to the complex composition, it is difficult to quickly and directly detect the poisons in them. At present, most samples need to be pretreated by large-scale detection and analysis instruments and unique extractants.

"We used ethanol and other solvents to remove impurities in the oily , and reduced the surface tension of the solution. In this way, the molecules can get close to the SERS substrate surface easily, so as to promote the target objects to enter the hot area of the SERS ," said Prof. Yang.

Combined with the hand-held Raman spectrometer, the research team performed SERS detection on paraquat and diquat in several common kitchen waste substrates.

"The detection limit could reach 10 ppb and 100 ppb, respectively," said Prof. Yang, "and the standard deviation is 7%. These data further proved that this method has good sensitivity and repeatability. It provides a solution to the problem of rapid detection of poisoning emergencies."

Citation: Ethanol-extraction SERS strategy provides highly sensitive detection of poisons in oily matrix (2021, August 25) retrieved 26 September 2023 from
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