Dimethyl ether analysis method
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Our company currently produces dimethyl ether, and I am responsible for its analysis. I use a packed column in series for this purpose, but I’m unable to detect water in the sample. Are there any colleagues who work on dimethyl ether analysis? Do you know what the detection limit for components is using this method? Is there a better approach? Thank you here first. This post was last edited by ft2489244 on 2007-11-27 at 14:41.]
I use HP columns to analyze water and methanol, and then subtract DME to achieve analysis at the ppm level; the column temperature is 120°C.
Could you tell me the detailed parameters of your columns and methods, such as flow rate, bridge current, and detector temperature? Thank you!
Brothers, analysis methods are established in industry standards; there’s no need to look around for them anymore
Methods do exist, but I want those of you who work on dimethyl ether analysis to share your experiences in the field, as different companies may use different chromatographs, columns, detectors, and working conditions
What is the purpose of the dimethyl ether products you produce? Dimethyl ether products are divided into ordinary grades (industrial or gas-grade, with a purity of ≥99.0%) and high-purity grades (aerossol-grade, with a purity of ≥99.99%). If it’s the former, what the person on the 4th floor said is correct; but if it’s the latter, that won’t work. The instrument used on the 2nd floor is an Agilent TCD, which has very high sensitivity, so there is hope, but the price of such an instrument is also very high. I haven’t actually used it, so I can’t say for sure whether it will work. After all, compared to FID, TCD has a significant difference in terms of sensitivity, and besides water, FID can detect 5-6 other impurities such as CO and CO2, making it difficult to use TCD in such cases.
Thank you, friend who came upstairs; we produce fuel-grade dimethyl ether. We want to be more accurate and precise; currently, our domestic chromatography systems are unable to detect water in low concentrations. Do you have any good suggestions? I don’t have that standard for dimethyl ether at the aerosol grade you mentioned; you’ll need to look for it on your own. If I find it, I’ll pass it on to you.
Our company is also currently trying to analyze dimethyl ether, but we don’t have the money
I’m sorry; I need the materials to make money