Public Lab Research note


Using the HITRAN database for spectral analysis

by warren | | 8,568 views | 6 comments |

Read more: unstable.publiclab.org/n/25


I'm really curious about our ability to identify methane and other gases with DIY spectroscopy in some form. I found this database of absorbances for various gases:

http://hitran.iao.ru/molecule

To quickly see what it provides, see this graph i generated on the site, for methane:

http://publiclaboratory.org/notes/warren/12-10-2010/methane-absorption-band-around-1100nm

The whole site is organized by wavenumber, which is the inverse of wavelength. (easy online converter: http://www.impublications.com/convert.php)


6 Comments

This reminds me of some work I heard about a few years ago, monitoring the emissions of automobiles as they drive past a mobile monitoring station. I believe the tailpipe emissions were monitored spectroscopically using a $10 black body source (an ignitor from a gas dryer), a series of infrared filters (to select wavelengths for detection) and a detector.

This technique could probably be applied to general atmospheric monitoring, though the fluctuations will be lower if you're probing well mixed air and not at the source of the emissions.

Here's the reference I found.

Environ. Sci. Technol. 2000, 34, 1110-1116

Good luck!


Attractive part of content. I just stumbled upon your blog and in accession capital to assert that I get actually enjoyed account your blog posts. Anyway I'll be subscribing for your feeds and even I achievement you get entry to constantly rapidly.


Hello There. I found your blog using msn. This is an extremely well written article. I'll make sure to bookmark it and return to read more of your useful info.

Thanks for the post. I'll certainly return.


Hello! I understand this is sort of off-topic but I had to ask. Does building a well-established blog like yours require a massive amount work? I'm completely new to operating a blog but I do write in my journal every day. I'd like to start a blog so I will be able to share my experience and thoughts online. Please let me know if you have any kind of recommendations or tips for new aspiring blog owners. Appreciate it!

Is this a question? Click here to post it to the Questions page.


Hello! I've been following your weblog for a long time now and finally got the bravery to go ahead and give you a shout out from Houston Texas! Just wanted to mention keep up the fantastic work!


nice


Login to comment.