Graphene oxide/prussian blue nanoparticle composite material solid-phase micro-extraction probe as well as preparation method and application thereof
A technology of Prussian blue and nanoparticles, which is applied in the field of graphene oxide/Prussian blue nanoparticle composite solid-phase microextraction probes and its preparation, can solve the problem of restricting the development and application of solid-phase microextraction technology, and it is difficult to meet the separation and analysis requirements , limited application range of extraction and other issues, to achieve the effect of simple and fast preparation steps, wide application range and controllable thickness
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[0045] Example 1 Preparation of Graphene Oxide / Prussian Blue Nanoparticle Composite Material
[0046] Preparation of graphene oxide / Prussian blue nanoparticle composite material: The composite material is synthesized according to the literature (Chem. Sci. 2015, 6, 4029), and the synthesis method is as follows:
[0047] Take 200 mg of graphene oxide and place it in 50 mL of ultrapure water, and ultrasonicate for 30 min to obtain a uniform graphene oxide dispersion. Subsequently, 170 mg of potassium ferricyanide and 50 mL of 0.01 mol / L hydrochloric acid solution were successively added to the graphene oxide dispersion under stirring to obtain a uniformly mixed reaction mixture. The reaction mixture was placed in the reactor and placed in an oven at 85°C for 24 hours. After the reaction, the product was collected by centrifugation, and the product was dried in a vacuum oven at 60°C for 12 hours, and finally a graphene oxide / Prussian blue nanoparticle composite material was obtained....
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[0048] Example 2 Preparation of solid phase microextraction probe for graphene oxide / Prussian blue nanoparticle composite material
[0049] Graphene oxide / Prussian blue nanoparticle composite solid phase microextraction probe preparation, the preparation process is as follows figure 2 , Specifically including the following steps:
[0050] S1. Pretreatment of stainless steel fiber: After cutting the stainless steel fiber into a length of 2 to 3 cm, immerse it in ultrapure water, methanol, and acetone in order, and ultrasonicate it for 30 minutes. Take it out and let it dry naturally.
[0051] S2. The configuration of the neutral silicone rubber diluent: After mixing 0.5 g of the neutral silicone rubber and 1.0 mL of o-xylene, stir it evenly, and ultrasonicate for 5 minutes to obtain the neutral silicone rubber diluent.
[0052] S3. Extend the pretreated stainless steel fiber into the neutral silicone rubber diluent, take it out, and wipe the visible droplets on the surface of the stain...
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