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Making grinding medium from chopped pieces of rebar?
If you're going to use them in a mill, why not tumble them to break the edges? |
19-6-2018 at 19:11
by: weilawei |
Bad days in the lab or with glassware?
I have 5 drives from work, pulled because they claimed they didn't work. I haven't got around to tes ... |
17-6-2018 at 07:49
by: weilawei |
Looking to acquire a functional HP 5890 ii GC
Keep a watch on eBay. On a good day, you can pick up one for south of 450$ USD. You will need to put ... |
17-6-2018 at 07:30
by: weilawei |
Bad days in the lab or with glassware?
Broke a 50mL beaker just now by dropping my phone onto it. Thankfully, it was not in use.
Ahhh.. ... |
16-6-2018 at 17:43
by: weilawei |
Bad elements from ebay again
I like the old Fisher brand Castaloy ones, and they're not all that much more. Pretty sure they'll o ... |
13-6-2018 at 17:08
by: weilawei |
Separate Isopropyl Alcohol and Xylene
12°C ought to be enough with slow, careful fractionation on a good column. I've been working with a ... |
12-6-2018 at 05:20
by: weilawei |
Piece of science
"You do not have permission to preview drafts."
Edit: It works from the main site. Nice writeup!
... |
6-6-2018 at 03:48
by: weilawei |
Are there chinese hotplates & heating mantles as good as others but significantly cheaper?
I work in environments with potentially flammable atmospheres, so we make heavy use of explosion-pro ... |
5-6-2018 at 10:53
by: weilawei |
how to produce .1 Pa vacuum
Does yours leak? I looked it up on Amazon and the reviews almost invariably slammed it for that. |
2-6-2018 at 08:37
by: weilawei |
Is there a solvent I can use to wash my vacuum pump oil reservoir?
[rquote=520183&tid=83470&author=alking]Wouldn't you save 50/yr that way, where do you get 20 ... |
1-6-2018 at 16:02
by: weilawei |
Is there a solvent I can use to wash my vacuum pump oil reservoir?
Or buy a cylinder for 200$ and save 20$ every year? It pays for itself in 10 years if you use the ab ... |
1-6-2018 at 12:47
by: weilawei |
Vandium pentoxide substitute
My understanding is that vanadium pentoxide is often plated on a support from a solution of ammonium ... |
31-5-2018 at 10:18
by: weilawei |
Is there a solvent I can use to wash my vacuum pump oil reservoir?
A cylinder of CO2 for dry ice only costs me about $40 to fill, and the rental is about $50/year. Tha ... |
31-5-2018 at 10:13
by: weilawei |
how to produce .1 Pa vacuum
My rotary vane pump will pull down to 6 mTorr on fresh oil and seals. Average is 13-17 mTorr in a cl ... |
26-5-2018 at 08:55
by: weilawei |
Storage of liquid chlorine
I have an FEP bottle for bromine storage, which I keep at ~-13°C. If the power were to fail, it wou ... |
25-5-2018 at 12:54
by: weilawei |
Borosilitate glass broke on heating
A cheap polariscope (around 25$) would allow you to see strain in glassware for future experiments, ... |
25-5-2018 at 10:55
by: weilawei |
how much of a history does glassware keep?
[quote]The only thing to do was to keep the peroxide in a tank made of something that didn’t catal ... |
22-5-2018 at 05:15
by: weilawei |
Zageno?
HiMedia has excellent prices and availability for all sorts of things, stock items (I think my last ... |
17-5-2018 at 10:33
by: weilawei |
Zageno?
Can't see what the point of that site is then. It seems trivial to search the very large and very co ... |
17-5-2018 at 05:22
by: weilawei |
Oxalyl Chloride Challenge
[rquote=516849&tid=82462&author=theAngryLittleBunny][rquote=516842&tid=82462&author= ... |
14-5-2018 at 12:43
by: weilawei |
Where can you purchase teflon sleeves/cuffs?
eBay is your friend here, bu a word of warning. They tend to seal poorly, and they are difficult to ... |
14-5-2018 at 10:10
by: weilawei |
lab set-up
1. No idea.
2. No idea.
3. HNO3
4. KNO3
5. KNO3
6. HCl
7. No idea.
8. Stuff. |
8-5-2018 at 12:24
by: weilawei |
Pretty Pictures (2)
Distillation of bromine from NaBr, TCCA, and HCl.
[file]68022[/file] |
8-5-2018 at 10:03
by: weilawei |
The Sciencemadness TLC Apparatus Challenge
Would something rigged out of an inkjet printer count? I wouldn't build the print head myself, but p ... |
30-4-2018 at 14:49
by: weilawei |
spirit lamp fuel
Perhaps if you posted a description of the lamp, we might be able to offer suggestions. I enjoy buil ... |
27-4-2018 at 09:59
by: weilawei |
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