Determination of c in gasoline or micro-reaction products by gas chromatography 6 The following methods for oxygenated compounds
A technology of micro-reaction products and gas chromatography, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of complex composition of gasoline, difficulty in separating oxygen-containing compounds from hydrocarbon components, and low content
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 1
[0050] The retention time of each oxygen-containing compound is determined according to the method of the present invention.
[0051] Using the Agilent 7890 gas chromatograph from Agilent, press figure 1 Connect the chromatographic column as shown, set the inlet temperature to 250°C, the inlet pressure to 72.26kPa in the steady pressure mode, the split ratio to 10:1, and the injection volume to be 1μL; nitrogen is used as the carrier gas, and flow1 and flow2 are controlled. The two pressures are 68.95kPa and 29.51kPa respectively; the initial temperature of the chromatographic column used is 100°C, keep it for 5 minutes, the heating rate is 5°C / min, and the final temperature is 210°C, keep it for 8 minutes; the solenoid valve 16 is set to ON state; The detector adopts double FID, the temperature is 280°C, the flow rate of hydrogen is 30mL / min, the flow rate of air is 350mL / min, and the flow rate of nitrogen (compensation gas) is 25mL / min. Precut column 1 is HP-5 (2m×0.32mm×0....
example 2
[0056] Prepare standard samples with a mass fraction of 2.0 μg / g for each component, analyze and measure under the same conditions as in Example 1, gradually dilute the standard sample concentration with n-heptane, and inject samples to determine the detection limit of each component. When the signal-to-noise ratio is 3, the determined detection limits of each component are shown in Table 2.
[0057] As can be seen from Table 2, due to C 1 ~C 3 Alcohol has a strong polarity and has a certain adsorption effect. Its detection limit is relatively high, ranging from 1.0 μg / g to 2.0 μg / g. The detection limits of acetaldehyde and propionaldehyde are 2.0 μg / g and 1.0 μg / g, respectively. The detection limit of oxygen-containing compound components is 0.5 μg / g.
[0058] Table 1
[0059]
[0060] Table 2
[0061]
example 3
[0063] The Agilent7890 gas chromatograph of Agilent Company was used, equipped with an autosampler, a heart-cutting assembly, a backflushing assembly, and a double FID detector. according to figure 1 Connect the column as shown. Chromatographic columns include: pre-cut column 1, HP-5 (2m×0.32mm×0.25μm), non-polar chromatographic column 2, DB-1 (30m×0.32mm×1.0μm), strong polar chromatographic column 4 , is OxyPLOT (10m×0.53mm×40μm), and the damping column is an elastic quartz column tube. The chromatographic conditions are: inlet temperature 250°C, inlet pressure 72.26kPa in steady pressure mode, split ratio 10:1, injection volume 1μL; nitrogen as carrier gas, hold for 0.7min, at a rate of 700kPa / min Decrease to 56kPa and keep it until the end of the analysis; the pressures of flow1 and flow2 carrier gases are 68.95kPa and 29.51kPa respectively, the initial temperature of the chromatographic column used is 100°C, keep for 5min, the heating rate is 5°C / min, and the final tempe...
PUM
Property | Measurement | Unit |
---|---|---|
density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com