A mofs/tio based 2 Analysis and detection method of bactericide in water for magnetic composite materials

A composite material and magnetic technology, applied in the field of analysis and testing, can solve problems such as the complexity of the centrifugation process and the degree of loss and enrichment of target objects

CN105664890BActive Publication Date: 2017-01-18SHANDONG ANALYSIS & TEST CENT
6 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2017-01-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for analyzing and detecting bactericides in water based on MOFs / TiO2 magnetic composite materials, which includes dispersing magnetic Fe3O4@SiO2 nanospheres in N, N- of 3-aminopropyltriethoxysilane and succinic anhydride. In the dimethylformamide solution, the surface is provided with carboxyl groups; the carboxyl-modified Fe3O4@SiO2 nanospheres are dispersed in a methanol solution of zinc nitrate and 2-methylimidazole, and the surface is coated with the metal-organic framework material ZIF ‑8, obtain Fe3O4@SiO2@ZIF‑8 nanoparticles; disperse Fe3O4@SiO2@ZIF‑8 nanoparticles in an ethanol solution of tetrabutyl titanate to prepare magnetic nanocomposite materials. This material simplifies the enrichment and separation process. By combining the advantages of MOFs and TiO2, the enrichment efficiency of fungicides can be improved. It can be used for the enrichment and separation of fungicides and the detection of liquid chromatography-tandem mass spectrometry.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a kind of based on MOFs / TiO 2 The invention relates to a high-sensitivity analysis and detection method for fungicides in water by magnetic nanocomposite material enrichment-liquid chromatography tandem mass spectrometry, which belongs to the field of analysis and testing. Background technique

[0002] Fungicides are widely used in the protection of various crops, fruits and vegetables. Because the fungicide has good stability, acid and alkali resistance and photobleaching resistance, it is simple and convenient in storage and use, and can control wheat smut, rice blast, melon powdery mildew, and flower diseases, etc. A variety of fungal diseases, the effect is remarkable. Representative fungicides include Thiabendazole, Metalaxyl, Dimethocarb, Myclobutanil, and Tebuconazole. Because fungicides show teratogenic and mutagenic effects in experimental animals, and the metabolites transformed in the human body also have ...

Examples

Embodiment 1

[0042] A kind of MOFs / TiO 2 Synthesis of Magnetic Nanocomposites:

[0043] (1) 1.35g ferric chloride hexahydrate (FeCl 3 ·6H 2 (2) and 50mL ethylene glycol are added in the beaker, after stirring and dissolving to clarification, slowly add 3.6g sodium acetate (NaAC), continue to stir for 30 minutes. After that, it was transferred to a polytetrafluoroethylene reactor and reacted at 200° C. for 8 hours. After the reactor was cooled down, the black product was separated under the action of an external magnetic field, washed several times with deionized water and ethanol, and dried overnight at 60°C; figure 1 with Figure 5 shown.

[0044] (2) 20mg of synthetic Fe 3 o 4 Add to 20mL ethanol, add 4mL H2 O and 100 μL ammonia water were sonicated for 30 minutes, and then 100 μL tetraethyl orthosilicate (TEOS) was added to continue sonicating for 5 hours. Product Fe 3 o 4 @SiO 2 It was separated under the action of an external magnetic field, washed several times with deioni...