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Method for simultaneously detecting two peculiar smell substances based on novel SERS (Surface Enhanced Raman Scattering) substrate

A substrate, odor technology, applied in measurement devices, instruments, material analysis by optical means, etc., can solve problems such as shedding and escape, low analyte signal intensity, etc.

Active Publication Date: 2022-03-01
FOSHAN WATER GRP GAOMING WATER SUPPLY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Odor substances, as volatile organic substances, are adsorbed by the precious metal substrate, and because the system is open, they are easy to fall off and escape from the surface of the material, resulting in low analyte signal intensity

Method used

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  • Method for simultaneously detecting two peculiar smell substances based on novel SERS (Surface Enhanced Raman Scattering) substrate
  • Method for simultaneously detecting two peculiar smell substances based on novel SERS (Surface Enhanced Raman Scattering) substrate
  • Method for simultaneously detecting two peculiar smell substances based on novel SERS (Surface Enhanced Raman Scattering) substrate

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Embodiment 1

[0033]Embodiment 1: The method for detecting two kinds of peculiar smell substances simultaneously based on novel SERS substrate

[0034] Follow the steps below to detect whether there are two odorous substances in the water body: methyl sulfide and 2,4-di-tert-butylphenol:

[0035] S1: preparing a SERS substrate: including the following steps:

[0036] S1a: Synthesis of Au@Ag NPs with core-shell structure: Au nanoparticles (Au NPs) were prepared by citrate reduction method: firstly, 950 μL of 5 g / L HAuCl was added to 60 mL of distilled water 4 4H 2 O aqueous solution, put the solution in a 120°C water bath, heat to boiling under stirring conditions, and then quickly add 500 μL of 1% trisodium citrate solution. Stop heating when the color of the solution turns into a stable wine red, and cool to room temperature for later use. Take 6 mL of Au NPs, add 120 μL of 1% trisodium citrate solution, and shake for 10 min. Add 320 μL of 10 mM ascorbic acid solution, and then slowly ...

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Abstract

The invention discloses a method for simultaneously detecting two peculiar smell substances based on a novel SERS (Surface Enhanced Raman Scattering) substrate. The method comprises the following steps: S1, preparing the SERS substrate; s2, drawing a standard curve of dimethyl sulfide and 2, 4-di-tert-butylphenol; s3, detection of odor substances in a water sample: immersing the to-be-detected water sample in the SERS substrate prepared in the step S1, placing the to-be-detected water sample in a closed experimental chamber, incubating at 40 DEG C for 10 minutes, and performing SERS detection after incubation is finished to obtain an SERS spectrogram; judging whether the water sample contains a target analyte or not by comparing characteristic peaks in the spectrogram; and calculating the concentration of the analytes in the water sample by using the standard working curves of the two analytes obtained in the step S2. The detection method can be used for simultaneously and rapidly detecting two peculiar smell substances including dimethyl sulfide and 2, 4-di-tert-butylphenol in the water body.

Description

technical field [0001] The invention belongs to the field of detection of odor substances, and in particular relates to a method for simultaneously detecting two odor substances based on a novel SERS substrate. Background technique [0002] Smell is a common problem in freshwater lakes around the world. Solving the problem of unpleasant taste and smell in water is an important issue that the world is paying attention to and striving to achieve. Among the many smelling substances, geosmin and 2-methylisoborneol are the most widely studied objects. Volatile organic compounds such as β-cyclic citral, phenols and thioethers have also received more and more attention in recent years. The current detection methods for these chemical substances mainly include sensory evaluation by trained analysts, gas chromatography coupled with mass spectrometry (GC-MS) and other methods. The sensory evaluation method needs to invest a lot of time and energy in advance to train specialized pers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 徐晓燕余广卓杜永亮李冰红李汉杰
Owner FOSHAN WATER GRP GAOMING WATER SUPPLY CO LTD
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