A kind of preparation method of outer surface hydrophilic hybrid composite solid phase extraction adsorbent
A hybrid composite, hydrophilic technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high impurity content in the separated sample liquid, easy adsorption of biological macromolecules, low separation and adsorption efficiency, etc., and shorten the reaction time. Time, not easy to shrink and deform, easy to separate and remove
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Embodiment 1
[0027] (1) Measure 2.25mL of acetonitrile, 0.6mL of styrene, 0.2mL of divinylbenzene and 1.176mL of vinyltriethoxysilane into a three-necked flask, add 0.10g of azobisisobutyronitrile, and dissolve it by ultrasonic , continuously filled with nitrogen for 30 minutes, refluxed at 65°C, a large number of white particles appeared after about 1 hour; continued to stir for 2 hours, and obtained the organic part solution A;
[0028] (2) Add 2.95mL tetraethyl orthosilicate, 4.525mL ethanol and 0.1mL concentrated hydrochloric acid into the Erlenmeyer flask at the same time, in a constant temperature shaker at 60°C (at any other temperature between 40-60°C) Shake for 1 hour to obtain a clear solution, and obtain the inorganic part solution B;
[0029] (3) After adding solution B to solution A dropwise, continue to stir and reflux at 65°C for 3h. That is to obtain a milky white turbid liquid, put the generated milky white turbid liquid evenly into a centrifuge tube and centrifuge at 140...
Embodiment 2
[0033] In step (2) of Example 1, 1.63 mL of tetraethyl orthosilicate, 3.02 mL of ethanol, and 0.07 mL of concentrated hydrochloric acid were added, and the others were the same as in Example 1 to obtain RAM-HCM2.
Embodiment 3
[0035] In step (2) of Example 1, 4.90 mL of tetraethyl orthosilicate, 9.05 mL of ethanol, and 0.20 mL of concentrated hydrochloric acid were added, and the others were the same as in Example 1 to obtain RAM-HCM3.
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