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Using Potassium Bromide in UV-Vis spectroscopy
Using UV/VIS spectroscopy, either an unknown substance can be identified or the concentration of a k ...
8-5-2016 at 05:44
by: dhaffnersr
Fluorescein study 6 sample concentrations plus an upgrade to the DVD grating
First, I had to make an upgrade to the DVD piece in my spectrometer this weekend, the way it was, it ...
1-5-2016 at 01:39
by: dhaffnersr
Data Validation of previous Eosin Y results for April/21/2016
Not too bad ezza, I see you are using the NaOH/ethanol buffer, I have been experimenting with that b ...
28-4-2016 at 03:34
by: dhaffnersr
Data Validation of previous Eosin Y results for April/21/2016
hey nezza:cool:

very clean, what are the peak wavelengths? curious because I have to use Plab's s ...
27-4-2016 at 03:36
by: dhaffnersr
Data Validation of previous Eosin Y results for April/21/2016
Hey nezza, nice plot. Remember that at higher sample concentrations your going to start suffering th ...
25-4-2016 at 02:34
by: dhaffnersr
Data Validation of previous Eosin Y results for April/21/2016
More on my research can be found here:

http://publiclab.org/profile/dhaffnersr

;)

23-4-2016 at 13:52
by: dhaffnersr
Data Validation of previous Eosin Y results for April/21/2016
Using my Aries series green laser, I wanted to validate the Eosin Y study I did the other day with t ...
23-4-2016 at 11:18
by: dhaffnersr
Testing fluorescein standards with homemade spectrometer
This post is related to the previous one:

conclusions, 2 data points stand out and they were samp ...
16-4-2016 at 09:05
by: dhaffnersr
Testing fluorescein standards with homemade spectrometer
accuracy test for version 2.5 Plab spectrometer, I ran a series of very detailed tests on my spectro ...
16-4-2016 at 09:02
by: dhaffnersr
Rev 3.0 to my LED driver circuit...
I revised my schematic to incorporate the bourns POT to control the main voltage and use the trimmer ...
7-4-2016 at 04:54
by: dhaffnersr
New upgrade for my spectrometer
New upgrade for my spectrometer


I redesigned the LED driver circuit for the prolight UV LED I u ...
6-4-2016 at 15:08
by: dhaffnersr
New upgrade for my spectrometer
ok
6-4-2016 at 15:00
by: dhaffnersr
government restrictions why bother
Believe me, its not so much that governments want to restrict your access to chemicals, they just do ...
5-4-2016 at 01:41
by: dhaffnersr
Bad Habits In The Lab
Ha! I thought I was the only one who swung around the empties;)

I'm glad you admitted it first th ...
3-4-2016 at 04:30
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b

[quote]
Have you used it for anything more than rhodamine?
[/quote]

Oh yeah, I've used it wit ...
2-4-2016 at 12:30
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b

[quote]
And here are instructions https://www.youtube.com/watch?v=fl42pnUbCCA
[/quote]

A very ...
2-4-2016 at 09:09
by: dhaffnersr
1Watt UV LED circuit ready for spectrometer testing
I just finished the prototype for my 1W UV LED for my spectrometer, I redesigned the driver circuit ...
1-4-2016 at 08:36
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b

[quote]
I would like more details please. Would you (please) describe the project in enough detai ...
1-4-2016 at 02:01
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b

[quote]
OK. That makes more sense. Raman. It would have been helpful to have mentioned that in th ...
1-4-2016 at 00:21
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b

[quote]
Looks nice, I didn't know you can get raman signals with a UV spectometer , the rayleigh ...
31-3-2016 at 11:10
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b
Here is a spectral scan of rhodamine b @ 50ppm-in ethanol and 100ppb in water using a homemade spect ...
31-3-2016 at 08:23
by: dhaffnersr
Readily Available Chemicals Website: Version 2

[quote]
Pretty sure he's in jail. Isn't that one of Organikum's accounts?
[/quote]

Oh man, I' ...
31-3-2016 at 01:06
by: dhaffnersr
Readily Available Chemicals Website: Version 2
Hello "I am a fish!"

What an amazing piece of work you did putting that list together, I have not ...
30-3-2016 at 15:51
by: dhaffnersr
ppm to mg/l conversion? & expressing concentration by percentage
Hey Bluamine, here is a niffty website that can make it easy;

http://www.lenntech.com/calculators ...
30-3-2016 at 15:30
by: dhaffnersr
Homemade spectrometer analysis of rhodamine b
I need the "notch" filter because it eliminates the laser line which causes what is called "rayleigh ...
30-3-2016 at 11:46
by: dhaffnersr
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