Array chip mass spectrometry analysis method of photoelectrochemical reaction intermediate
An array chip, chemical reaction technology, applied in the field of mass spectrometry analysis, can solve problems such as difficult detection, restricting the development of photoelectric catalysis theory, catalyst development, short life of intermediates, etc., to achieve the effect of in-situ analysis, avoiding delay and avoiding influence
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[0027] Example 1
[0028] A titanium dioxide-modified array chip is used in conjunction with electrostatic spray ionization mass spectrometry to detect the intermediates in the photooxidation reaction of mitoxantrone. It includes the following steps:
[0029] Take 0.1g of Degussa P25 titanium dioxide, grind it in a mortar for 1 hour, add 1 ml of 1% acetic acid dropwise during the grinding process, disperse the ground titanium dioxide powder in 1 ml of ethanol, and dilute it 25 times in water to obtain 4 Milligrams per milliliter of titanium dioxide suspension. The suspension is modified on the glass surface using inkjet printing technology to form an array chip. The chip was burned at 400 degrees Celsius for one hour and then naturally cooled.
[0030] 0.4 millimoles per liter, 1 microliter of mitoxantrone aqueous solution was dropped on the surface of the glass plate modified with titanium dioxide, and it was directly detected by electrostatic spray ionization mass spectrometry. ...
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[0032] Example 2
[0033] A graphene-modified polyimide array chip was used in conjunction with electrostatic spray ionization mass spectrometry to detect the intermediates of the photooxidation reaction of mitoxantrone.
[0034] Graphene oxide ink formula: Add 3 mg of graphene oxide flakes (Nanjing Xianfeng Nano Material Technology Co., Ltd.) and 50 mg of polyvinylpyrrolidone (PVP) powder to 1 ml of water: isopropanol (3:1) mixture, and Ultrasound in an on / off cycle with an amplitude of 35% in a 2 ml centrifuge tube for 180 minutes. The final dispersion concentration is 3 mg / ml graphene oxide. Then, put the dispersion in a centrifuge at 13000 g Centrifuge for 20 minutes and remove the supernatant. Thereafter, the precipitate was redispersed in 1 ml of 1,2-propanediol-based mixture, which contained 10% terpineol.
[0035] An inkjet printer was used to print the above ink on the surface of a polyimide substrate (0.2 mm thickness) to form an array of dots with a diameter of 0.2 mm, ...
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