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Science equipment looking for a home
It is getting extremely expensive to ship anything out of the US now, due to stupid postal treaties ...
16-11-2019 at 19:40
by: Dr.Bob
Suggestions for glass joint-grease that won't get stuck after vacuum distillations?
Teflon tape is fine for most cases, but will not hold a high vacuum as it is both slightly gas perme ...
13-11-2019 at 20:00
by: Dr.Bob
Suggestions for glass joint-grease that won't get stuck after vacuum distillations?
They make some very thin Teflon sleeves that work well for vacuum work, but not cheap. I agree tha ...
12-11-2019 at 17:54
by: Dr.Bob
best option for analysing chemicals in home lab
Finding any working Mass Spec for $5000 would be a miracle, but a great deal if so. But without th ...
31-10-2019 at 10:25
by: Dr.Bob
Silica gel for food packaging->silica gel for chromatography?
Not readily. The stuff in food packets is not even close to what you need for chromatography. The ...
31-10-2019 at 10:17
by: Dr.Bob
Science equipment looking for a home
I do have lots of 24/40 distillation kit pieces, not sure if I have enough yet to make a complete ki ...
29-10-2019 at 18:05
by: Dr.Bob
Storage containers
I would avoid PVC for much in the lab, it is not only not resistant to most organics, but it becomes ...
25-10-2019 at 06:38
by: Dr.Bob
Chemical Availability Changes from 15 years ago (US)
I have been thinking about the hobby chemist for a while. 35 years ago, I could walk into a drug s ...
23-10-2019 at 18:53
by: Dr.Bob
Where to get cheap TLC plates?
I have some F254 plates, along with lots of other various ones. I'm happy to provide almost any TLC ...
21-10-2019 at 18:03
by: Dr.Bob
PTFE filters? What are they for?
They are membrane filters, often used to micro filter a solution. They are ideal for removing almos ...
21-10-2019 at 09:14
by: Dr.Bob
Science equipment looking for a home
Here are a few more photos. Some Shlenk line stuff (one piece is broken), some older glassware (mak ...
20-10-2019 at 19:08
by: Dr.Bob
Science equipment looking for a home
Here is another group of photos of more sep funnels I found in 250 and 125 ml sizes. I also still h ...
20-10-2019 at 18:26
by: Dr.Bob
Science equipment looking for a home
Here are some photos of newly found items, from a few more boxes from the bottom of the pile. Ther ...
20-10-2019 at 18:15
by: Dr.Bob
Where to get cheap TLC plates?
I have some TLC plates in 200 x 200 mm format. They are a little old, so I would sell cheap, and ca ...
20-10-2019 at 16:44
by: Dr.Bob
Ideas to run a chromathography column (menthol / camphor)
Just run a column on silica gel (or alumina) and go from hexane to ethyl acetate. Use TLC to decid ...
16-10-2019 at 16:36
by: Dr.Bob
Storage containers
Many containers work well, almost all are better than plastic bags. I like glass, as that tends to ...
12-10-2019 at 05:12
by: Dr.Bob
Max G. Gergel
They were doing much of the large Me Iodide synthesis during World War II, and were short handed, un ...
9-10-2019 at 10:41
by: Dr.Bob
Piecing Together the Ultimate Distillation Set
If you want to do an all glass distillation, I have 3 way distillation adapters with 10/30 glass joi ...
23-9-2019 at 09:12
by: Dr.Bob
Adipic acid and hexamethylenediamine from Nylon 6,6 cable ties
hexametyhylenediamine is very water soluble, and likely quite polar, as a diamine, so less smell tha ...
19-9-2019 at 04:59
by: Dr.Bob
Post-reaction workup of diisopropylethylamine
A trace of water will dissolve some of the salts and create anothet layer. Might want to dry the M ...
19-9-2019 at 04:55
by: Dr.Bob
Science equipment looking for a home
Thanks to the many people who have been helping me find homes for so much glassware. I have editte ...
19-9-2019 at 04:49
by: Dr.Bob
tool coatings removal
If DCM does not work well, try DMSO or DMF, they strip off most paint and plastic.
4-9-2019 at 09:51
by: Dr.Bob
Max G. Gergel
Not sure if shut down by EPA, or closed before it could happen, but something like that. That has ...
4-9-2019 at 07:15
by: Dr.Bob
Max G. Gergel
What many people don't understand is that in many cases, for example in world war 2, companies were ...
3-9-2019 at 17:58
by: Dr.Bob
Separation of toluene and isobutanol
Both are excellent octyane enhansers, just add a few quarts to your tank at every fill up if you can ...
16-8-2019 at 07:30
by: Dr.Bob
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