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| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hmm, interesting! Would a cell phone screen be a really consistent spectrum? I wonder how much variability there is in manufacturing. " | Read more » | about 7 years ago | |||
| fieldlab | "Thanks for your reply @warren. There is pretty good discussion going on about this concept on hackaday for Pb detection in drinking water a la Flin..." | Read more » | about 7 years ago | |||
| warren | "Hmm, interesting. I don't know much about paper assays, but this kit available online says: Smallest Increment: Steps: 0, 0.15, 0.3, 1, 1.5, 3 ppm..." | Read more » | about 7 years ago | |||
| Slavik | "Looking for affordable alternative of http://store.vstapps.com/collections/frontpage/products/vst-lab-cof-esp-iii-refractometer " | Read more » | about 7 years ago | |||
| emontoya57 | "Very inspiring nice work!!! " | Read more » | over 7 years ago | |||
| breadytoroll | "@homechemist what is this "multi range LED" you refer to? I did a quick search online that didn't turn up any continuously varying LED's, could you..." | Read more » | almost 8 years ago | |||
| warren | "Wow, @homechemist just posted a great update, here: http://publiclab.org/notes/homechemist/06-12-2015/the-importance-of-infrared-radiation-infrared..." | Read more » | almost 8 years ago | |||
| chemcarr | "This is very interesting. I am also working towards this kind of analysis, and especially open source accessible, whether fabrication or software/k..." | Read more » | about 8 years ago | |||
| Frikkie | "Just noticed video1's name show nitrate. Its meant to be nitrite, sorry about that. " | Read more » | about 8 years ago | |||
| Phil | "This is wicked Stuff! Thanks for sharing! " | Read more » | about 8 years ago | |||
| Frikkie | "For anyone who wants to try out the excel tool, here is the video’s for the recordings I made for the colorimetric nitrite analysis, the EC and fla..." | Read more » | about 8 years ago | |||
| jakemartin | "Here is the paper I was thinking of and it is an open paper so everyone should be able to read it. http://www.mdpi.com/1424-8220/8/4/2453 There is ..." | Read more » | over 8 years ago | |||
| jakemartin | "Thanks Mathew, The linearity in the sensor is a problem however it should be exponential so it can be removed. I am imagining the measurements of..." | Read more » | over 8 years ago | |||
| mathew | "I want to highlight this awesome part of your blog post: The next step is to see if quantitative fluorescent measurements could be done by using a..." | Read more » | over 8 years ago | |||
| mathew | "the linearity of that resistor is going to be temperature dependent and non-linear. it may be necessary to get another device to characterize it. ..." | Read more » | over 8 years ago | |||
| chemcarr | "Markdown Great ! I am thinking on similar lines. You have a great CuSO4 calibration curve there. I work with aquaponics lab ion the incredible aq..." | Read more » | over 8 years ago | |||
| homechemist | "Interesting, it´s kind a Tyndall effect no?, but however i think that is not enough accurate to "select" an specific wavelength like an specific fi..." | Read more » | almost 9 years ago | |||
| amysoyka | "*sorry the PIC with my hand around it didn't give it justice...here is a better shot, with the blackout paper. " | Read more » | almost 9 years ago | |||
| amysoyka | "To highlight: The range of colours you get from different length glue sticks. What it looks like normally on my hand. (It works best if you w..." | Read more » | almost 9 years ago | |||
| amysoyka | "I've been experimenting with lots of things... I ended up getting sucked up into the world of photography as a result. (Which covers a lot of this)..." | Read more » | almost 9 years ago | |||
| homechemist | "okay great, it should be perfect for starting, i have read one of your projects ( element's identification) and i have been working on that for a t..." | Read more » | almost 9 years ago | |||
| amysoyka | "I found that this online course went into s lot of that at a basic level. https://www.open2study.com/courses/chemistry " | Read more » | almost 9 years ago | |||
| homechemist | "well, yeah that is absolutely true, red cabbage contents Anthocyanin which is a perfect universal indicator(in fact , I use it as ph indicator fo..." | Read more » | almost 9 years ago | |||
| amysoyka | "I just finished an online chemistry course - and in that the bloke mentioned that boiled red cabbage is natures perfect universal indicator. Could ..." | Read more » | almost 9 years ago |