tapwater
tapwater


Author Comment Last activity Moderation
warren "I've submitted a bug report with steps to fix: https://github.com/publiclab/plots2/issues/885 -- sorry! " | Read more » over 7 years ago
warren "I'm actually having trouble editing this page -- must be a bug due to it being "converted" to a question instead of being one from the start. " | Read more » over 7 years ago
warren "Actually i haven't tried marking a question as an activity; i guess it works? Maybe not a good practice? I dunno -- new territory for us! As to you..." | Read more » over 7 years ago
pdhixenbaugh "Also: I'm not sure if you're testing (1) Hot Tap Water vs Cold Tap Water, or (2) Hot Tap Water vs. Hot Tap Water which has cooled down. Put another..." | Read more » over 7 years ago
pdhixenbaugh "So both questions and research notes can be marked as an activity? And at some point, folks replicating the activity can post their answers? I like..." | Read more » over 7 years ago
warren "I renamed this and converted it to a "Question" in the new Q&A system " | Read more » over 7 years ago
QMTphysicist "Hi Suiris, it good to see how filtering the tap water works. How do you take transmittance measurements using spectralworkbench? I am looking into ..." | Read more » almost 9 years ago
GreenChemist "Hi Warren, Thanks. I am a chemical engineer who always worked in Medical and Safety industries. Currently I am looking for a new position anywhere ..." | Read more » almost 9 years ago
warren "It's a good point -- esp. always to be sure that the scope of the test is clear. The idea here was more exploratory, but in general this kind of co..." | Read more » almost 9 years ago
GreenChemist "Hi Warren, Indeed the test would not find the bacteria, you need a polymerase chain reaction (a PCR test), or grow a culture. I am not sure if this..." | Read more » almost 9 years ago
warren "Hi, Don - sorry, you never wrote back so I hadn't changed the title until now - it now says "Coqui" only - thanks. The conclusion you draw: it s..." | Read more » almost 9 years ago
GreenChemist "Hi Warren, I am new at this, so maybe I missing the ball, but isn't one of the reason why not to drink from the hot tap the possible presence of L..." | Read more » almost 9 years ago
warren "Great, thanks Don. I can change the title/body to reflect whatever name you think is more appropriate -- "Coqui-based water conductivity sensor"? ..." | Read more » over 9 years ago
donblair "Ah, this is all so great! This brings up a bunch of interesting issue for me that I'd love to get feedback on. Naming conventions. Maybe it'd be..." | Read more » over 9 years ago
kanarinka "Hey @warren @donblair and Katie - Nice work - this is simple and exciting. we did a home brewed test of Coquí here last weekend with hot/cold water..." | Read more » over 9 years ago
Suiris "The test was just to measure the difference in clarity between tap water and filtered water, using a single wavelength instead of a white warm LED ..." | Read more » almost 11 years ago
Ernie "I afraid that using a laser will not tell you much about the chemical composition of any contamints in your water. The laser spectrum is much too ..." | Read more » almost 11 years ago
Suiris "Hi drabanus, The time span between each spectra was less than 30 seconds and the LED light had been on for quiet some time before I began the tests..." | Read more » almost 11 years ago
Suiris "Hi Ernie, Thanks for the great advice and information. To be honest I am completely new to te spectrometer hobby and most of what you wrote baffles..." | Read more » almost 11 years ago
drabanus "One other test to characterize the stability of your spectrometer is to just repeat identical measurements after a certain time span, say minutes, ..." | Read more » almost 11 years ago
Ernie "Some typo's in my previous post: To normalize your sample spectrum, you will want (delete "you") to divide... Use an (delete "sample") empty bottle..." | Read more » almost 11 years ago
Ernie "I hope your system is mechanically stable so as to get reproducible spectra. With regard to the illumination spectrum (the LED), it is not truly w..." | Read more » almost 11 years ago
Suiris "I am using a Canon IXUS 120 IS for taking pictures, then I cut out the spectrum from the black background, paste it as a new image and upload it t..." | Read more » almost 11 years ago
danbeavers "OK then I would like to know about your work flow. Are you using a camera attached to your computer or are you taking a picture and then processing..." | Read more » almost 11 years ago