Re: [DIYbio] Re: Hacking Stink Bugs

actually it looks like drying it with zeolite is really cheap

"

Ken wrote ...

... I finally have something to report, namely, how BEAUTIFULLY zeolite (aka "molecular sieve") works to suck the last bit of water out of distilled ethanol. I got a sample of Type 3A Molecular Sieve from a place in So. Calif. called Adcoa: http://www.thomasregister.com/olc/adcoa/molecula.htm

I got a can of the 4-8 mesh -- little balls of rock about 1/8" dia. -- they absorb about 20% of their weight of water over the course of a few hours. Take a liter of 95% ethanol, throw in 250g of stuff, swirl occasionally, filter out the next day thru a strainer, and presto! Anhydrous ethanol. Not expensive either -- $2.05 a pound US in 10 lb quantities, and reusable indefinitely. You drive off the water under a broiler for an hour.

"

from:

http://homedistiller.org/distill/polish/dry

On Fri, Dec 28, 2012 at 8:05 PM, Nathan McCorkle <nmz787@gmail.com> wrote:

16oz 100% ethanol is $4.79 with a 'tax exempt' permit, how does one get that? Does anyone here have that?

the same bottle shows $17.06 with tax (and you have to buy a case of 24 in either case)

https://us.vwr.com/store/catalog/product.jsp?product_id=7756054

On Fri, Dec 28, 2012 at 4:44 PM, Dakota <dkotes@gmail.com> wrote:

And to speak to your question on waste, you raised a question I've been wondering for a long time, and also taught me what a "conditionally exempt small producer" was.  I had never heard of the term before.

What you said about properly labeling and separating waste is a good idea.  The only real waste I could see you guys making would be directly related to the solutions involved in the DNA isolation kits, as well as buffer after running a gel, which honestly isn't that bad. 

I just found this link, https://bluetigerportal.lincolnu.edu/c/document_library/get_file?uuid=d4600066-aa07-421e-81f1-95cc163af191&groupId=375800

which shows how many things can be thrown out in the trash or flushed down the drain.

Agarose is on there, Tris is on there, ammonium acetate if neutralized, or brought within range of 5.5-10.5 pH + tons more.

Also, GelGreen can be thrown out in the trash to, http://www.biotium.com/product/product_info/newproduct/gelred_gelgreen.asp

It's different for each city and state, because some cities use septic, some use some other water treatment facility.  Call your local waste management and ask or maybe your police department has one of those links above.  On one hand, one could speculate DIY people don't want to draw attention to themselves by asking about "disposing of scientific waste", but on the other hand, the waste they are generating could be really cheap to dispose of at a facility, if not completely legal to just wash down the drain or throw away.  I don't have a good answer for that because it's different in each state.

Your write-up on proper storage seems fine, if not overkill.  Millions of people have solvents and gasoline and all sorts of stuff sitting under sinks or in sheds or garages not "properly" stored, so I can't imagine getting flak for some salt buffer and ethanol.  

--
-- You received this message because you are subscribed to the Google Groups DIYbio group. To post to this group, send email to diybio@googlegroups.com. To unsubscribe from this group, send email to diybio+unsubscribe@googlegroups.com. For more options, visit this group at https://groups.google.com/d/forum/diybio?hl=en
Learn more at www.diybio.org
---
You received this message because you are subscribed to the Google Groups "DIYbio" group.
To post to this group, send email to diybio@googlegroups.com.
To unsubscribe from this group, send email to diybio+unsubscribe@googlegroups.com.
Visit this group at http://groups.google.com/group/diybio?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

--
-Nathan

--
-Nathan