Hydrogen flame extinguishing

The ratio of hydrogen to the oxidizing gas is not appropriate

Hydrogen has a low density and is located entirely at the top of the cylinder. Try to shake it well; that might help.

The ratio of hydrogen to dry air is not correct; reduce the amount of hydrogen and increase that of dry air. Once the instrument stabilizes, adjust it back to the proper settings. We have encountered this issue before as well

Is it related to capillaries? I remember that hydrogen, air, and nitrogen are in a ratio of 1:10:1

There are many reasons for the extinction of a hydrogen flame, which generally include the purity of the gas source, whether the gas supply lines are unobstructed or leaking, whether the gas ratios are appropriate, and whether there are any installation errors. But in practice, it is often caused by very minor issues, or even by unbelievably basic mistakes. Because I have had many such experiences. 1. Be sure to check carefully whether the type and purity of the gas source, as well as the gas supply circuit and proportioning, are all normal ； 2. According to you, the problem arose from replacing the nozzle; did you follow the procedures exactly when installing the capillary column? If the capillary retracts by 1 mm, is there a problem with the installation of the collector electrode? (For example, in Agilent models, there is a small spring that requires great care; I have encountered similar problems.) ； Also, is there anything wrong with your nozzle? Was it replaced with a brand new one? Could we try another one? In short, it is necessary to rule out potential problems in all areas step by step in order to ultimately identify the root cause. Good luck!

Thank you. After reinstalling the column, the fire is no longer detected. The slope ranges from 1200 to 2600; some peaks fail to appear, and there is a lot of noise. I’d like to age the chromatography column – are there any other suggestions?

I’m not sure if you mean that the components that should have been detectable in the relevant standard gas samples did not show up as peaks? Is the peak still present, but its shape is very small, making it difficult to integrate automatically or manually? Personally, I think your issue should be analyzed from three perspectives: the separation performance of the chromatography column and the detector, the sample, and integration. 1. Chromatography column separation performance and detector: This is a prerequisite – that is, whether the chromatography column is capable of separating your target compounds, and whether the installed detector can detect those compounds and enable their accurate identification and quantification ； 2. Samples: Is the content of the target component in the samples you purchased too low, exceeding the sensitivity of the detector? ； 3. Integration: If a peak appears but it is very small, making automatic or manual integration impossible, then the slope needs to be adjusted. According to you, the noise is high and the target component fails to show a peak; if the above three aspects are confirmed to be correct, based on my limited experience, it is likely still a problem with the chromatography column. You can try aging it first, but I’m worried it might not be an issue related to that. I still recommend that you verify that the most basic parameters and operations are correct. Please wait for more detailed answers from experts, or after you resolve the issue by communicating with the manufacturer, kindly attach the details of how it was solved in this post to clear up any doubts. Thank you :)

What a strange answer. Are there any other heavy gases in addition to hydrogen in a hydrogen tank? I’m not sure if you’re familiar with gas cylinders; it seems like you’ve never seen high-pressure gas cylinders at all, yet you were able to give such a funny reply.

Oh, I thought it was the ignition of the air-fuel mixture.