This is a testing site only. See the live Public Lab site here »

Hydrogen Sulfide

_This is the organizing page for research related to hydrogen sulfide in Public Lab._ (above: [DIY colorimetric strips](/notes/megan/9-7-2012/first-experiment-analyzed) reacting to H2S by @megan) ### What is hydrogen sulfide, what are its effects, and where is it found? Hydrogen sulfide, with the chemical formula H2S, is a flammable gas that has a pungent odor at low concentrations and is odorless at higher concentrations. It can be a respiratory irritant and a neurotoxin. [Read more about hydrogen sulfide health effects](/wiki/hydrogen-sulfide-effects). Hydrogen sulfide is naturally formed in low-oxygen conditions with sulfate present, such as in organic-rich sediments and thus in petrochemical source rocks. Upon exposure to oxygen, hydrogen sulfide readily oxidizes to sulfur dioxide or sulfate, and generally reacts within hours to days. [Read more about hydrogen sulfide sources and spatial and temporal variation](/wiki/hydrogen-sulfide-environment) ### How are hydrogen sulfide emissions and exposures regulated? In the United States, hydrogen sulfide emissions are only federally regulated to the extent that they contribute to sulfur dioxide formation, and thus acid rain. These emissions are regulated through the Prevention of Significant Deterioration of major stationary sources review and permitting. Exposure to hydrogen sulfide is mostly regulated in terms of occupational exposure, with very few states regulating ambient exposure to this toxin. [Read more about hydrogen sulfide regulations](/wiki/hydrogen-sulfide-regulations) ## How can hydrogen sulfide be measured? While there is no federal regulatory method for hydrogen sulfide in the US, labs, agencies, and oilfield workers often measure hydrogen sulfide gas through several different means: * badges or glass tubes that change color * continuously sampling electronic sensors, some worn by oilfield workers * [air grab sampling](/wiki/air-sampling), as by the Bucket Brigades, tested with gas chromatography > We're compiling information about the **pros, cons, prices, and sensitivity/limitations** of these techniques: [What are different commercially available hydrogen sulfide detection methods?](/notes/warren/12-04-2017/what-are-different-commercially-available-hydrogen-sulfide-detection-methods) ## Do-It-Yourself approaches to detection There are three prototype, low-cost hydrogen sulfide detection methods currently being explored by Public Lab community members. These include: * a [method using photographic paper](/wiki/hydrogen-sulfide-photopaper) * a [copper tarnishing method](/wiki/hydrogen-sulfide-copper-pipe) * a technique using a [Do-It-Yourself potentiostat](/notes/JSummers/03-10-2014/quantifying-airborne-hydrogen-sulfide) * commercial [electronic H2S sensors](/wiki/hydrogen-sulfide-sensor) connected to a computer or #arduino > Help out! Please help link the above bullet points to corresponding pages across this site. **** ## Questions We can't make progress on these techniques and resources without addressing our unknowns. Please ask questions to help shape the direction of our work! [questions:hydrogen-sulfide] **** ## Related pages See [other related wiki pages here]( **** ## Activities These activities are to guide you to test out hydrogen sulfide detection methods or use these tools in the field: [activities:hydrogen-sulfide] **** ## Where can I find more information? Two particularly good resources are listed below. Other hydrogen sulfide wiki pages (mentioned above) include additional relevant resources. 1. Agency for Toxic Substance and Disease Registry. 2016. Hydrogen Sulfide Fact Sheet. []( 2. National Research Council. 2010. Acute Exposure Guidelines. []( ...

Author Comment Last activity Moderation
eustatic "dot " | Read more » about 5 years ago
eustatic "I ended up with pump calibration kit...did i kill the momentum on this project? signs point to yes @gretchengehrke I think mat did a youtube video " | Read more » about 5 years ago
eustatic "i'm tagging this and mathew's volume calibration video with "h2s" " | Read more » about 5 years ago
warren "Nice! ChemSee's H2S-KT1 contains two hydrogen sulfide dosimeters, FULL USE INSTRUCTIONS and in-lab analysis by ChemSee. Together, these two items ..." | Read more » about 5 years ago
zengirl2 "There's also this post on sensors from this Public Lab post. " | Read more » over 5 years ago
stevie "I've found a couple systems for grab sampling. It seems as though there are some commercially available systems such as the Summa Canister, but the..." | Read more » over 5 years ago
sarasage "RKI (Riken Keiki) makes an popular 4-gas monitor, the GX-2012, which includes CO, O2 as well as CH4. The cal station doubles the cost of the equipm..." | Read more » over 5 years ago
gretchengehrke "There are a bunch of sensors commercially available through this vendor: Has anyone used one ..." | Read more » over 5 years ago
warren "Hi, just wondering - were the controls completely sealed, or did you also put controls in areas where there was air, but not air with H2S? Just thi..." | Read more » over 5 years ago
warren "Just in case the Slideshare disappears, i'm uploading the PDF here: deaverfinal-140617232405-phpapp01.pdf " | Read more » over 5 years ago
thomashooper "That is very fantastic from the design, the construct, the starting, the video, the images...Everyone said a new era of computer assisted drug desi..." | Read more » over 6 years ago
warren "Hi, Sophie - did you get to do your follow-up tests? I'm curious what's happened since you published this! Thanks! " | Read more » almost 7 years ago
nshapiro "@mathew yes. yes yes yes yes. " | Read more » over 7 years ago
mathew "studio shots " | Read more » over 7 years ago
eustatic "you are the boss. Awesome. I have some GCM field sampling notes, and those forms echo what David Mack just typed. Although i suppose weather isn..." | Read more » over 7 years ago
DavidMack "That's great work. The videos are very well done and have a lot of info explained in a nice, straight forward manor. I like the photo card. Add ..." | Read more » over 7 years ago
mathew "ran some tests on the different Kitagawa tubes that have been used. I put the end into the drilled-out brass tube I've been using to break them, a..." | Read more » over 7 years ago
mathew "I bought and tried a 50ml pipette and made a dropout jar. The jar kind of works-- some condensation still seems to get through, but never bubble..." | Read more » over 7 years ago
DavidMack "@mathew I believe you have the VWR series FR2000 rotameter, which the accuracy is specified as +/- 5% of full scale, so that's +/- 0.05 lpm. see h..." | Read more » over 7 years ago
danbeavers "@mathew What do you mean by " small control orifice into a brass rod and put it at the intake"? I hope you are thinking manometer . . . What I s..." | Read more » over 7 years ago
nshapiro "@mathew were the two tubes that you are comparing opened by different means? perhaps if we can just standardize the tip breaking better we wouldn't..." | Read more » over 7 years ago
mathew "ok, looking at a photographic record of the flow rate between the two rotameter measurements it does seem like the change in flow is noticeable. F..." | Read more » over 7 years ago
mathew "@danbeavers I couldn't find that little heart. It may have been lost when the box arrived. @davidmack I ran the VWN rotameter with the valve all t..." | Read more » over 7 years ago
danbeavers " @mathew That heart shaped object is the abrasive chip. When @nshapiro and I did my first measurement Nick said the scoring chip should be in the..." | Read more » over 7 years ago