A qualitative and quantitative analysis method for high-pressure liquid materials
A high-pressure liquid, quantitative analysis technology, applied in the field of qualitative and quantitative analysis of high-pressure liquid materials, can solve the problems of long residence time, difficult detection of liquid materials, low detection efficiency, etc., achieve low cost, solve inaccurate quantitative analysis, detection high efficiency effect
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[0176] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.
[0177] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.
Embodiment 1
[0179] 1 The sample is the high-pressure liquid material obtained after the pilot test of isobutane oxidation
[0180] 2 Pretreatment of samples
[0181] Weigh the sampling cylinder, accurate to 0.01g, recorded as m 0 . Add about 150g of water to a three-necked flask with a shut-off valve, accurate to 0.01g, and record the weight as M 1 ; Weigh the total mass of the cylinders that have been sampled m 1 , accurate to 0.01g. Connect the three-necked flask to the sampling small steel cylinder, and connect the sampling bag to the other port of the three-necked flask. After the connection is completed, the whole system is evacuated. Then fill the whole system with high-purity nitrogen to replace the air in the system. After the replacement is completed, close the nitrogen filling valve. Slowly open the outlet valve of the steel cylinder to avoid splashing of bubbles emerging from the liquid surface, and release the liquid within 8-10 minutes. Replace the nitrogen in the air b...
Embodiment 2
[0225] This embodiment provides a detection unit for liquid components, the detection unit includes a gas chromatograph, a sixth chromatographic column, a first detector, a second detector, an automatic flow controller and an automatic pressure controller; the gas phase The chromatograph includes a sample inlet, a fourth chromatographic column, a fifth chromatographic column and a heart-cutting part; one end of the fourth chromatographic column is connected to the gas chromatograph inlet, and the other end is connected to the inlet of the heart-cutting part, The first outlet end of the heart cutting part is connected to the first detector through the sixth chromatographic column; the second outlet end is connected to the fifth chromatographic column, and the outlet end of the fifth chromatographic column is connected to the second detector;
[0226] The first detector and the second detector are thermal conductivity cell detectors or hydrogen flame ionization detectors; the aut...
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