Spectrometer
question:spectrometer

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Author Comment Last activity Moderation
chuynh451 "Here is my latest try: https://spectralworkbench.org/spectrums/89850 " | Read more » about 6 years ago
warren "Can you link to your spectra so I can see? " | Read more » about 6 years ago
warren "Updated my answer: yes! " | Read more » about 6 years ago
warren "Yes, it'd also be helpful if you could share any links or knowledge you have that you're working to reproduce in a DIY manner -- for context. Actu..." | Read more » about 6 years ago
liz "Hi @haribhimaraju , it's great to hear from you! This is a really big question you have asked, with many smaller questions inside of it that thems..." | Read more » about 6 years ago
warren "Just another note here -- starting to look for someone interested in creating an activity out of a beer's law demonstration -- for determining conc..." | Read more » about 6 years ago
warren "I also wanted to link back to this idea of monitoring the green peaks over a period of time: As to how to measure this, I'd suggest a real-time di..." | Read more » about 6 years ago
warren "There are now some upgrade proposals for more rigid internals: https://publiclab.org/notes/stoft/09-16-2016/stability-upgrade-mockup-for-plab-spect..." | Read more » about 6 years ago
warren "@stoft has proposed a set of tests and thresholds for different rigidity"standards" of sorts, here: https://publiclab.org/notes/stoft/09-15-2016/wh..." | Read more » about 6 years ago
abdul "Hello bsugar, The DSK 3.0 is made of paper. The paper is, without getting technical, slightly more rigid and slightly thicker than a greeting card..." | Read more » about 6 years ago
stoft "Jeff, Those are really two different questions. 1) Measuring instrument resolution: A) Could use a single, narrow BW laser (if that BW is known to..." | Read more » over 6 years ago
peace "Thank you for your comment. That's a good point. I will be looking into this. " | Read more » over 6 years ago
interestedperson_ha "@all who gave a comment/ answer: Thanks a lot for your advice, sorry for my late reply. Since I regard myself as spectrometry-newbie reading the c..." | Read more » over 6 years ago
warren "I think that makes sense. I didn't mean Beer Lambert would be related to the reagent's affect on the color, but merely that if the reagent reacts l..." | Read more » over 6 years ago
stoft "It is my understanding that Beer's law is not the relationship between reagent's effect on color, but is the property of light passing through a un..." | Read more » over 6 years ago
warren "Oh yeah -- actually that's an open source method too, by Joshua Pearce's lab; you can find some of the parts here: http://www.thingiverse.com/thing..." | Read more » over 6 years ago
tonyc "check out this tool, using reagents: here may be what you are looking for? " | Read more » over 6 years ago
stoft "@warren has a good point; the smaller the change in transmitted light (as a function of attenuation caused by concentration change) the greater the..." | Read more » over 6 years ago
gretchengehrke "Hi @FoxClass, This is a great question. As the other commenters have mentioned, to compare intensities across different wavelengths, an intensity ..." | Read more » over 6 years ago
warren "However, if it's possible to either turn off exposure compensation between your two scans, or to scan both spectra at the same time (side by side),..." | Read more » over 6 years ago
warren "Yes, as @stoft mentions, an absolute intensity calibration is not required for demonstrating the Beer Lambert law; @mathew refers to a post about g..." | Read more » over 6 years ago
warren "Hello, what are you interested in specifically measuring, in nutrients? Nitrogen, potassium, phosphorus? I believe there are some colorimetric reag..." | Read more » over 6 years ago
warren "Hi, I haven't heard of someone doing this sort of analysis in our community, and since at least ethanol and methanol are optically clear (not famil..." | Read more » over 6 years ago
stoft "The Beer-Lambert law primarily states there is a relationship between attenuation and wavelength of light through a substance. The attenuation is l..." | Read more » over 6 years ago