Method for rapidly detecting volatile formaldehyde by surface enhanced Raman scattering (SERS) and application of method

A surface-enhanced Raman and volatility technology, applied in Raman scattering, sample preparation for testing, material excitation analysis, etc., can solve the problems of expensive instruments and reagents, unsuitable for rapid on-site analysis of formaldehyde, and time-consuming sample determination.

Active Publication Date: 2013-12-11
SUN YAT SEN UNIV
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Problems solved by technology

Conventional formaldehyde analysis generally relies on large-scale spectroscopic and chromatographic instruments, which have high sensitivity and good accuracy, but the instruments and reagents used

Method used

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  • Method for rapidly detecting volatile formaldehyde by surface enhanced Raman scattering (SERS) and application of method
  • Method for rapidly detecting volatile formaldehyde by surface enhanced Raman scattering (SERS) and application of method
  • Method for rapidly detecting volatile formaldehyde by surface enhanced Raman scattering (SERS) and application of method

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Embodiment Construction

[0034] The method for the rapid detection of formaldehyde by SERS of the present invention and its application are based on the following chemical reactions:

[0035]

[0036] The color of the final formaldehyde derivatized product is blue-green, and the depth of its color is positively correlated with the concentration of formaldehyde, that is, the greater the concentration of formaldehyde, the darker the color. The derivatized product has a good Raman enhancement effect, and a surface-enhanced Raman spectrum is obtained, and the content of formaldehyde is indirectly determined by measuring the amount of the derivatized product.

[0037] Examples of the method for quickly detecting formaldehyde by SERS of the present invention and its application are as follows, but the content of the present invention is not limited thereto.

[0038] Example SERS rapid detection of volatile formaldehyde in seafood

[0039] 1.1 Main instruments and reagents:

[0040] DeltaNuInspector por...

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Abstract

The invention relates to construction of a portable purging and trapping sampling device of volatile formaldehyde, and a method for rapidly detecting volatile formaldehyde by surface enhanced Raman scattering (SERS) and application of the method. The portable purging and trapping sampling device of volatile formaldehyde comprises a gas path purging system and a sampling system. The volatile formaldehyde in an actual sample reacts with a derivatization reagent after being purged by high-purity nitrogen, an enhanced particle is added to a reactant and then the detection is carried out through a Raman spectrometer. The formaldehyde reacts with a phenol reagent under the action of ammonium ferric sulfate under the acidic condition to generate a blue-green compound, and an SERS signal of the blue-green compound is enhanced and is superior to that of the formaldehyde, so that the formaldehyde is subjected to indirect qualitation and quantitation through determining the blue-green compound. The portable purging and trapping sampling device adopts Au/SiO2 as an SERS base material, is suitable for determination of the volatile formaldehyde in complex samples such as aquatic products, foods and environment, and has the advantages of simpleness, rapidness, high selectivity, and the like, and is suitable for field detection.

Description

technical field [0001] The invention relates to a method for rapid detection of volatile formaldehyde by surface-enhanced Raman spectroscopy (Surface-enhancedRamanscattering, SERS), in particular to a method for rapid detection of volatile formaldehyde by SERS and its application, which is suitable for volatile formaldehyde in complex samples such as aquatic products, food, and the environment determination. Background technique [0002] Formaldehyde is colorless at room temperature and has a strong pungent odor. It is the simplest small molecule volatile organic compound, which can cause strong irritation to human eyes, skin, respiratory system, nervous system, etc., and has the risk of teratogenic and carcinogenic . [0003] Although formaldehyde can be used for antisepsis, long-term consumption of foods containing trace amounts of formaldehyde will pose a great hazard to human health. my country's "Food Hygiene Law" clearly stipulates that formaldehyde and formaldehyde-c...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N21/65G01N1/24
Inventor 张卓旻李攻科马云建赵城田中群
Owner SUN YAT SEN UNIV
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