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Ammonium persulphate + sulphuric acid as a sub for piranha solution
[rquote=639040&tid=155641&author=Keras]Do you use it cold or hot?[/rquote]

I don't heat i ...
24-6-2020 at 00:40
by: DavidJR
Ammonium persulphate + sulphuric acid as a sub for piranha solution
I don't really know, I've never had 30% hydrogen peroxide to make piranha with. But what I do know i ...
23-6-2020 at 04:58
by: DavidJR
Mysterious orange-brown residue inside used glassware
DCM works well for removing old nasty grease.
22-6-2020 at 16:01
by: DavidJR
Ammonium persulphate + sulphuric acid as a sub for piranha solution
12% hydrogen peroxide still works.
22-6-2020 at 04:47
by: DavidJR
Disappointing results with 3A molecular sieves
My sieves are nowhere near that dusty.
21-6-2020 at 17:39
by: DavidJR
Buchi Screw Wheel 00565 needed!
[rquote=638895&tid=18283&author=spankyetal]
Repairs can be kept below $25.00 using a clay ...
21-6-2020 at 11:29
by: DavidJR
Chinese rotavaps?
[rquote=638621&tid=155584&author=SWIM]
@DavidJR: Nice.

I wasn't expecting it to be so ne ...
18-6-2020 at 13:41
by: DavidJR
Chinese rotavaps?
In addition to the usual use of removing solvent from solutions, I've also had great success using [ ...
17-6-2020 at 17:57
by: DavidJR
Preparing a chromatography column
It does depend on how good a separation you get though. If well resolved you might be able to exceed ...
17-6-2020 at 03:30
by: DavidJR
Preparing a chromatography column
How fine is your silica gel? you shouldn't need to worry about it passing through the frit if you're ...
17-6-2020 at 02:33
by: DavidJR
Benzoin condensation using hydrogen cyanide?
[rquote=637596&tid=155502&author=SplendidAcylation][rquote=637385&tid=155502&author= ...
8-6-2020 at 06:38
by: DavidJR
Keeping Ammonium fluoride solution in a glass bottle
[rquote=637473&tid=155518&author=Ubya]https://www.youtube.com/watch?v=LRw5-WQERbM

there's ...
3-6-2020 at 09:44
by: DavidJR
Keeping Ammonium fluoride solution in a glass bottle
Why not just use a plastic bottle?
3-6-2020 at 01:33
by: DavidJR
Benzoin condensation using hydrogen cyanide?
Found online:

(From http://www.chem.latech.edu/~upali/chem254/BENZOINC.pdf)
[file]81370[/file]
...
2-6-2020 at 02:00
by: DavidJR
will a trace of hydrogen cyanide catalyse the
Catalyse the what?
1-6-2020 at 01:19
by: DavidJR
Advice on buying a GC/MS
Rogue rose: that is just a mass spec, no chromatograph there. So it will really only be useful for t ...
21-5-2020 at 15:19
by: DavidJR
Silver and Copper Cyanide from Potassium Ferrocyanide
That looks great.
20-5-2020 at 08:47
by: DavidJR
Advice on buying a GC/MS
[rquote=636531&tid=155416&author=monolithic]I've always wanted to buy HPLC or GC/MS but the ...
20-5-2020 at 08:41
by: DavidJR
Advice on buying a GC/MS
I often see old FTIRs sell on ebay for more than old HPLCs...
19-5-2020 at 19:00
by: DavidJR
Advice on buying a GC/MS
[rquote=636445&tid=155416&author=Nonexistent]
I don't know how game I would be to use 2nd h ...
19-5-2020 at 16:40
by: DavidJR
Advice on buying a GC/MS
Sorry, I was strictly just talking about the chromatography part... Obviously HPLC/MS is much more u ...
19-5-2020 at 05:55
by: DavidJR
Advice on buying a GC/MS
HPLC is overall just much more versatile than GC. You have more options of separation modes, and you ...
19-5-2020 at 04:36
by: DavidJR
Latest chemical order?
Recent orders:
[list]
[*] 1kg oxone ("potassium peroxymonosulfate", but more accurately 2KHSO5·KH ...
18-5-2020 at 05:44
by: DavidJR
Looking for Sudan III (Sudan Red) or substitutes...
https://www.ebay.co.uk/itm/Sudan-III-C-I-26100-100g/184273428031?hash=item2ae78d5e3f:g:spMAAOSwpEleq ...
14-5-2020 at 10:12
by: DavidJR
Hotplates
Do not use open flames to heat vessels of flammable solvents. It is an accident waiting to happen/
14-5-2020 at 04:47
by: DavidJR
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