Nitrogen doped titanium dioxide nanotube matrix-based solid-phase extraction column
A solid-phase extraction column and titanium dioxide technology, applied in the direction of inorganic chemistry, silicon compounds, non-metallic elements, etc., can solve the problems of enrichment differences, etc., and achieve the effects of low cost, easy availability of materials, and wide application range
Inactive Publication Date: 2010-11-17
HENAN NORMAL UNIV
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Problems solved by technology
Although there are many solid-phase extraction agents developed at present, there are great differences in the enrichment of different polar compounds by different extraction agents. In addition, there are many types of pollutants in the environment, so it is necessary to develop more solid-phase extraction agents. Phase extraction reagents, laying the foundation for better and more convenient sample handling techniques
At present, no relevant research based on nitrogen-doped titanium dioxide nanotubes as a solid-phase extraction agent has been reported in the literature. We conducted preliminary experiments and the results showed that the larger specific surface area of nitrogen-doped titanium dioxide nanotubes is more effective in the enrichment of organic pollutants. It has a relatively large advantage, and has obtained a very good enrichment performance, which can be a good solid phase extraction agent. It has shown great potential in the enrichment of organic pollutants in the environment, and will be used as a solid phase extraction Preparation of solid-phase extraction column will have a very good application prospect
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[0026] 1. Place a porous sieve plate at the bottom of the solid phase extraction column, weigh 100 mg of nitrogen-doped titanium dioxide nanotubes into the solid phase extraction column tube, and then place another porous sieve plate on the nitrogen-doped TiO2 nanotube upper part, compacted. A nitrogen-doped titanium dioxide nanotube solid-phase extraction column was obtained.
[0027] 2. A mixed solution of diquat and paraquat with a concentration of 30 μg / mL was prepared as a standard stock solution, and an analysis and detection method based on capillary electrophoresis was established.
[0028] 3. Take environmental water samples such as lake water and tap water for the application test of the present invention. After the water sample was filtered through a 0.45 micron microporous membrane, the acidity was adjusted to pH9, and then the standard stock solution was added until the spiked concentrations of diquat and paraquat were respectively 17 μg / L and 6 μg / L as sample so...
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The invention belongs to the field of chemical analysis and test instruments, relates to a nitrogen doped titanium dioxide nanotube matrix-based solid-phase extraction column, and provides a material for enriching organic pollutants and inorganic pollutants in an environmental water sample. With larger specific area, the Nitrogen doped titanium dioxide nanotubes have greater advantages in organic pollutant enriching. The test of the performance indexes of the solid-phase extraction column by diquat and paraquat show that the solid-phase extraction column has high repeatability and stability as well as great potential in environmental pollutant enriching and has a very promising application prospect.
Description
1. Technical field [0001] The invention belongs to the field of chemical analysis testing instruments and equipment, and relates to a solid-phase extraction column based on a nitrogen-doped titanium dioxide nanotube matrix, which uses nitrogen-doped titanium dioxide nanotubes as environmental sample pretreatment materials for organic pollution in environmental water samples Accumulation of pollutants and inorganic pollutants. 2. Background technology [0002] The background and development status of this technical field are roughly as follows: due to the diversity and complexity of the matrix of environmental samples, and the concentration of target pollutants in environmental samples is relatively low, as the main object of environmental monitoring, accurate and reliable data can be obtained, and the sample processing Pre-concentration and purification has become a key link. At present, there are many technical studies on sample pretreatment, and many new technologies have...
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Inventor 周庆祥毛金丽毛小权
Owner HENAN NORMAL UNIV