Method for detecting bisphenol compound based on magnetic metal organic framework composite material
A technology of organic framework and composite materials, applied in the field of detection of bisphenol compounds based on magnetic metal organic framework composite materials, can solve the problems of poor extraction effect of bisphenol compounds
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Embodiment 1
[0062] The analysis and detection method of four kinds of bisphenol compounds in the environmental water sample that embodiment relates specifically comprises the following steps:
[0063] Step 1: Preparation of magnetic metal-organic framework composite Fe 3 o 4 @SiO 2 / ZIF-8:
[0064] (1) Dissolve 1.35 g of ferric chloride hexahydrate in 40 mL of ethylene glycol, then add 3.6 g of sodium acetate, and stir to dissolve;
[0065] (2) React the mixture prepared in step (1) at 200°C in a solvothermal reactor for 8 h, and wash the mixture prepared in the solvothermal reactor with ethanol and ultrapure water to obtain trioxide Iron (Fe 3 o 4 ), and dried under vacuum at 60˚C for 12 h;
[0066] (3) Add 0.3 g of Fe 3 o 4 , 1.5 mL of concentrated ammonia water and 60 mL of high-purity water were added to 300 mL of ethanol, and ultrasonicated for 4 h to obtain a uniformly dispersed reaction system;
[0067] (4) Add 1.5 mL of tetraethyl orthosilicate to the homogeneously disper...
Embodiment 2
[0082] In this example, the main factors affecting the extraction peak area of four kinds of bisphenol compounds are investigated, the optimum value of each factor is calculated when the extraction peak area is the highest, and then the four kinds of bisphenols are determined under the condition of the optimum value of each factor The relevant parameters of the working curve of the compound, the specific process includes the following steps:
[0083] Step 1: Calculate the optimal value of each factor when the extraction peak area of the four bisphenol compounds is the highest:
[0084] (1) Investigation of the amount of adsorbent on the extraction peak area
[0085] In this example, the effect of the amount of adsorbent on the extraction peak area was investigated, and 10, 20, 30, 40, 50 mg of magnetic metal-organic framework composite Fe 3 o 4 @SiO 2 / ZIF-8 in 100 mL simulated water sample, the concentration of four bisphenol compounds in the water sample is 30 μg / L, t...
Embodiment 3
[0097] In order to test the reliability of the method, the actual lake water samples were selected to examine the feasibility of the method. All water samples were filtered through a 0.45 μm membrane filter prior to analysis. No bisphenol compounds were detected in the actual water samples. Added 10 and 50 μg / L bisphenol compounds in the water sample respectively, and the recovery rate of the added standard was 82.3-103.1%, such as Figure 7 As shown, this meets the requirements of trace analysis of actual water samples. The above experimental results show that the magnetic metal-organic framework composite Fe 3 o 4 @SiO 2 It is feasible to apply ZIF-8 to the analysis of trace bisphenols in actual environmental water samples.
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