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dhaffnersr 107 research notes and 158 wiki edits | Joined over 3 years ago






























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"Here is the power point presentation I made, Carbol_Fuchsin_-Basic_Fuchsin.pptx " | Read more » almost 3 years ago
"@Lakehaz I am so very happy that you are finding my work this helpful! " | Read more » almost 3 years ago
"@Lakehaz thank you,I hope this was helpful! Dave H " | Read more » almost 3 years ago
"References: http://en.wikipedia.org/wiki/Oleic_acid http://cdn.intechopen.com/pdfs/27027/InTech-Analysis_of_olive_oils_by_fluorescence_spectroscop..." | Read more » almost 3 years ago
"@stoft, here is another scan I did today of the dish detergent that was undiluted, full strength in the cuvette, and compared it again to the absor..." | Read more » almost 3 years ago
"@stoft hey dave, this is my response to your challenge. Dave H " | Read more » almost 3 years ago
"@Aspen Hey aspen, thank you, I am very happy that this was so helpful for you, I checked out your link and those are also the kind of resources tha..." | Read more » almost 3 years ago
"@warren , Jeff, Please re-visit my research study on the crude oil sample I did: http://publiclab.org/notes/dhaffnersr/05-18-2016/crude-oil-analys..." | Read more » almost 3 years ago
"@warren , Yes jeff, oil under a UV laser pointer will fluoresce a "whitish blue" color, gasoline will fluoresce more "white" because it contains mo..." | Read more » almost 3 years ago
"@stoft, an explanation for the percentage instead of wavelength at the bottom of the absorption plot, is because the absorption percent of 0.4074 a..." | Read more » almost 3 years ago
"Hey @eatabean, you could centrifuge it yes, but the easiest way would be to do an absorbance spectral analysis, where you can get a snap shot of al..." | Read more » almost 3 years ago
"Ha, this is very cool, its like a turbo charged tack welder! " | Read more » almost 3 years ago
"Upon proofreeding the post...again, I forgot to include the quatum yield for the reference sample(control) which is: 68.5% Sorry Dave H " | Read more » almost 3 years ago
"@stoft not to worry dave, I am experimenting with how to use the integration aspect of spekwin32, I'm trying to see if I can measure the minimum in..." | Read more » almost 3 years ago
"@stoft hey dave I'm including the 2 plots again with data labels " | Read more » almost 3 years ago
"@stoft Hey Dave I thought you might find this interesting. I did an integration time capture of my 405nm laser and the 532nm laser because I wanted..." | Read more » almost 3 years ago
"@stoft hey Dave, I thought we never say "oops," but "Ah...Interesting!" Spekwin does include automatically in the legend "averaged," but I removed..." | Read more » almost 3 years ago
"@stoft hey dave, I did remove the laser line from the plot, more so, when I subtracted the blank from the sample, part of the laser line was still ..." | Read more » almost 3 years ago
"@stoft I apologize if you thought I was using ad hominem attacks, it was not meant to be so. I can read very well dave, the same might be said abou..." | Read more » almost 3 years ago
"@stoft hello dave, I don't know why you think it is not possible, you have such a defeatist attitude. Of course its possible, I'm not going to do a..." | Read more » almost 3 years ago
"@stoft hey Dave, ok here is a snipet of my concept for a tunable LED, it is based on a bi-color led, the red and green type, instead it is sandwich..." | Read more » almost 3 years ago
"@abdul I do have the 405nm UV laser pointer, but I find it's usefulness limited for certain applications. I originally I bought the Plab 2.5 spectr..." | Read more » almost 3 years ago
"@stoft hey Dave, well thank you for replying, I appreciate that. I said before, I have read ALL your work here, and I have learned from it also, I ..." | Read more » almost 3 years ago
"@stoft, your quote: "So, my suggestion is that ALL data having been taken with either 400-470nm type LEDs or with 532nm or similar sources be excl..." | Read more » almost 3 years ago

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