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| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| gretchengehrke | "Agreed! " | Read more » | over 5 years ago | |||
| gretchengehrke | "@warren, I thought the sandpaper we used (that was like a polisher) worked well to remove grime on the surface of the copper, which is its purpose...." | Read more » | over 5 years ago | |||
| gretchengehrke | "Hi @Ag8n, I just now responded to this question in your other question thread. The validation work is being conducted at BEESL at Syracuse Universi..." | Read more » | over 5 years ago | |||
| gretchengehrke | "hi @Ag8n, the validation work is being conducted by the Building Energy and Environmental Systems Laboratory at Syracuse University. The protocol i..." | Read more » | over 5 years ago | |||
| gretchengehrke | "@Ag8n, our goal is to have this system be less expensive and more sensitive than Draeger tubes. The pumps recommended for Draeger tubes are often v..." | Read more » | over 5 years ago | |||
| gretchengehrke | "Hi @pdhixenbaugh! This is great. Have you seen that there is an Open Hour on Data Loggers this Monday (12/4) at noon ET / 9am PT? Might you be free..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Hi @warren, "miscible" means it dissolves with them to create a homogenous mixture (i.e. doesn't separate out like oil and water do). Acetone is a ..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "The general principles discussed in this wiki would apply for hydrogen sulfide sampling too: https://publiclab.org/wiki/general-environmental-monit..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "@Zengirl2, I think for the best results you'll want to use acetone, which is easy to find online and in a lot of drug stores and art stores (and ma..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "There has also been a lot of turbulence in Michigan about deregulating for several years. This article has a quick rundown of some of it: https://g..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Hi @gilbert, It looks like Wisconsin's state legislature is trying hard to deregulate! See this NPR article: https://www.wpr.org/wisconsin-lawmake..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Yes! Pennsylvania is actually one of the few states that does have ambient air quality standards for hydrogen sulfide! Read more here: https://publ..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Yes, OSHA does regulate workplace exposure to hydrogen sulfide. The OSHA "ceiling" exposure limit is 20 ppm, though NIOSH- the federal research ins..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "In the United States, hydrogen sulfide is not considered a "criteria pollutant" or a hazardous air pollutant. Thus, there are no federal ambient ai..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Here are before and after photos. We did not expect (and did not observe) any discoloration since we were only putting them out for less than 24 ho..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Here is a picture after sanding one of the little copper strips. The green pad is actually soft sandpaper / polishing paper. " | Read more » | almost 6 years ago | |||
| gretchengehrke | "Here is a picture of cutting the copper sheet into strips. " | Read more » | almost 6 years ago | |||
| gretchengehrke | "Hi @warren, Thanks for the reminder to add pictures. I have tried inserting photos a few times today, but it keeps crashing the edit (and, seemingl..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "Hi @Zengirl2, I'm not sure about the copper strips. Whatever copper is used needs to be fairly pure, and I'm not sure if the copper tape is pure c..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "I think we should distinguish between tags and topics. I think, while we still don't use the word "topic" widely on the site, we have the opportuni..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "@cfastie, I have those same questions too re: many tags, one wiki; one tag, many wikis. I'm hoping we can start creating primary wikis that are top..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "@eustatic, no worries -- Mathew got this pretty far (complete, perhaps?). The video is embedded in this page: https://publiclab.org/wiki/formaldehy..." | Read more » | almost 6 years ago | |||
| gretchengehrke | "This is so cool! Thanks Liz! " | Read more » | almost 6 years ago | |||
| gretchengehrke | "Hi Stevie, in my experience, it really depends on what the end goals are (e.g. assessing general/chronic conditions or synopses of specific conditi..." | Read more » | almost 6 years ago |