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Micro-solid-phase extraction adsorbent for detecting odor substances in water and preparation method of micro-solid-phase extraction adsorbent

A technology of smell and taste substances and adsorbents, which is applied in the field of micro-solid phase extraction adsorbents and their preparations for the detection of smell and taste substances in water. It can solve the problems of flow overflow and difficult to retain materials, etc., achieve effective extraction, improve sensitivity and accuracy , the effect of a simple size effect

Active Publication Date: 2021-09-03
FOSHAN WATER GRP GAOMING WATER SUPPLY CO LTD
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Problems solved by technology

However, odorous substances, as volatile organic substances, are easy to flow and overflow from these nanomaterials with open pores or pore structures when they are adsorbed by these nanomaterials, and it is difficult to be retained in the materials. Therefore, it is necessary to develop a Nanomaterials with strong adsorption capacity and retention capacity to achieve more efficient enrichment of odor substances

Method used

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  • Micro-solid-phase extraction adsorbent for detecting odor substances in water and preparation method of micro-solid-phase extraction adsorbent
  • Micro-solid-phase extraction adsorbent for detecting odor substances in water and preparation method of micro-solid-phase extraction adsorbent
  • Micro-solid-phase extraction adsorbent for detecting odor substances in water and preparation method of micro-solid-phase extraction adsorbent

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experiment example

[0042] 1, material characterization

[0043] Using XRD to verify the successful synthesis of ZIF-67 and CO-Ni LDH, figure 1 Indicated. The structural characteristics of ZIF-67 appear on the GO / ZIF-67 spectrum, including the peaks of 2θ = 7.5, 11, 12, 14.5, 16.5, and 18.5; Similarly, the spectrum of the GO / Co-Ni LDH also The characteristic peaks (003) of the LDH structure appear, (009) and (110). The characteristic peaks of GO (2θ = 12.15) were found on the spectrum of the two, indicating that it was masked by ZIF-67 and LDH.

[0044] figure 2 (a) ~ (e) SEM images of GO, ZIF-67, CO-Ni LDH and GO @ LDH composites. As can be seen from the figure, ZIF-67 is a smooth positive four-sided particle surface, and when ion etching of ZiF-67 is formed, the tetrahedral surface has a rough, and a significant sheet structure occurs. When GO is composite to Co-Ni LDH, the surface topography of the LDH has not changed, but the original uniform distribution state is changed to a state in which...

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Abstract

The invention provides a preparation method of a micro solid-phase extraction adsorbent for detecting odor substances in water. The preparation method comprises the steps of S1, synthesizing GO / ZIF-67; and S2, synthesizing GO / CoNi-LDH, specifically, dispersing the GO / ZIF-67 obtained in the step S1 in an ethanol solvent, adding Ni(NO3)2.6H2O, adjusting the pH value to 10, performing ion etching on the ZIF-67, heating the mixed solution in a water bath at the temperature of 85 DEG C, stirring for 1 hour until purple disappears, centrifugally collecting precipitate, and drying to obtain the product GO / CoNi-LDH. According to the adsorbent prepared by adopting the preparation method disclosed by the invention, odor substances in water are enriched and extracted in a dispersive solid-phase extraction manner, so that the sensitivity of analysis and detection is effectively improved, odor components which cannot be detected by gas chromatography originally can be clearly detected by GC after being enriched and extracted, and the detection sensitivity and accuracy of the odor substances in the water are improved. In addition, the adsorbent also has good reusability.

Description

Technical field [0001] The present invention belongs to the analysis of the analysis of chemicals, and more particularly to a micro-solid extraction adsorbent for olfactory substance detection in water and a preparation method thereof. Background technique [0002] The olfactory is a common problem in the global freshwater lake. It solves the hard taste and smell of smell in the water. It is an important issue that is concerned and strive in the world. The olfactory substance is mainly produced by human activities such as wastewater discharge through organic chemicals produced by the biochemical process. The presentness will affect the quality of drinking water, even if the concentration is low, the odor will cause water to drink. At the same time, when the olfactory substance in the water is absorbed and accumulated by aquatic organism, it will have a potential threat to human life health through the delivery of the food chain. Therefore, it is necessary to detect these olfactor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/20B01J20/281B01J20/30B01D15/08G01N30/06G01N30/08
CPCB01J20/226B01J20/20B01J20/281B01D15/08G01N30/06G01N30/08G01N2030/062
Inventor 赵向阳劳志雄谭剑荣余广卓梁晓燕
Owner FOSHAN WATER GRP GAOMING WATER SUPPLY CO LTD
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