Method for extracting and analyzing water-soluble and water-insoluble organic matters in atmospheric fine particulate matter
A technology for water-soluble organic matter and atmospheric fine particles, which is applied in the analysis of materials, material analysis and sampling through electromagnetic means, can solve the problems of lack of in-depth understanding, and achieve the effect of high accuracy, high resolution and fast scanning speed
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[0029] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0030] Collect atmospheric fine particles, cut the sampling filter membrane 3cm×3cm (about 60m 3Air volume, 3.6 mg of atmospheric fine particles) were placed in a 15 mL glass centrifuge tube, 5 mL of ultrapure water was added, and ultrasonically extracted for 40 min. After filtering with a 0.45 μm water-based filter membrane, pass through an SPE column whose matrix is a divinylbenzene polymer. The SPE column is first activated with 3 mL of methanol and rinsed with 3 mL of water. The pH of the extract is adjusted to 2 with hydrochloric acid (1mol / L). , and then loaded on the SPE column, rinsed with 3mL ultrapure water and sucked dry, eluted twice with 3mL of methanol, and the eluate was nearly dry at 40°C, and finally methanol / water (1:1v / v) Dilute to 1mL, store in a refrigerator at -20°C for testing, and analyze water-soluble organi...
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