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Aqua regia dangers
The gold won't precipitate until the oxidizers are used up.
A reasonably sensitive test for gold ... |
7-1-2010 at 17:13
by: densest |
Aqua regia dangers
The big problem with reducing the metals is getting base metals as well: copper, nickel, lead, tin, ... |
6-1-2010 at 14:07
by: densest |
Fuming Nitric Acid
There's a chemical supply house in Oklahoma which specializes in nitric acid including RF. PM me if ... |
5-1-2010 at 22:11
by: densest |
Improving thermal conductivity from a hot plate
The aluminum (aluminium) foil trick is very useful! Some glass wool inside the foil (think cheap unf ... |
5-1-2010 at 22:04
by: densest |
capacitor discharge
EBW requires a fast rise time. Below 1 microsecond is a figure I've heard; there have been threads o ... |
5-1-2010 at 21:18
by: densest |
Medical Laser
Sounds like an RF heating cautery. Big valves/tubes are impressive in a steampunk sort of way  ... |
5-1-2010 at 20:53
by: densest |
Windup magnetic stirrer.
Cold hard steel shatters. Bicycle thieves love LN2.
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5-1-2010 at 20:40
by: densest |
Windup magnetic stirrer.
The lubrication in your motor and gearbox is not designed to work below (say) -10C, so it may spin, ... |
4-1-2010 at 05:36
by: densest |
Hydrogen ignited in Ozone gas
Ummmm... forgive me, but I'm laughing. I -really- want a process which would let me store oxygen in ... |
3-1-2010 at 22:45
by: densest |
Windup magnetic stirrer.
If you decide to use a metal axle, stainless steel is a remarkably bad heat conductor for a metal. A ... |
3-1-2010 at 22:15
by: densest |
Hydrogen ignited in Ozone gas
Rapid charging battery systems are in various stages of development. Charging causes metal to be dep ... |
2-1-2010 at 13:33
by: densest |
Hydrogen ignited in Ozone gas
You'd still get oxides of nitrogen unless you carried an oxygen concentrator and fed the engine with ... |
1-1-2010 at 18:52
by: densest |
Need help with glassware problem
Have you checked the used lab equipment places like the one in Maryland or the couple of glass peopl ... |
1-1-2010 at 18:40
by: densest |
The effect of acid on skin
More on the original topic: I once spilled a flask of aqua regia on my hand - luckily it was somewha ... |
1-1-2010 at 13:35
by: densest |
Need help with glassware problem
@magpie - are you -sure- of the 10mm and 25mm dimensions? It seems strange that a big manufacturer w ... |
1-1-2010 at 13:15
by: densest |
Hydrogen ignited in Ozone gas
Ozone wouldn't be easy to use in an (internal combustion) engine. Besides attacking most plastics an ... |
1-1-2010 at 12:51
by: densest |
Bonding PTFE
@not_important - thanks! Time to go to the welding shop for a tank of oxygen-free argon... There are ... |
31-12-2009 at 22:21
by: densest |
Bonding PTFE
I've successfully closed PTFE tubing ends by heating until it becomes semitransparent then pressing ... |
31-12-2009 at 17:22
by: densest |
capacitor discharge
Commercial inexpensive CD units use 10-25A or so SCRs chosen for their pulse handling rating. A mult ... |
16-12-2009 at 14:04
by: densest |
What molecular sieve sizes do I need for methanol, ethanol and diethyl ether?
Two thoughts:
Use a (partial) vacuum to remove volatile substances from molecular sieves, and/o ... |
14-12-2009 at 14:59
by: densest |
Homebuilt 1300°C tube furnace
The "standard" insulation for high temperature thermocouple wires is braided glass/silica/asbestos s ... |
13-12-2009 at 12:07
by: densest |
Better table of reduction potentials?
The table in the chem rubber handbook isn't complete enough? I'm sure it has Ag+3 <-> Ag+1
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3-12-2009 at 19:09
by: densest |
'Continuous' distillation?
Have you seen drawings of countercurrent continuous stills? Very simply, it's a vertical column with ... |
22-11-2009 at 22:21
by: densest |
Scott BlueLine pH probe woe's
The voltage from the probe is about right - 59 mV per pH unit. The article you read may have been sl ... |
22-11-2009 at 21:40
by: densest |
Scott BlueLine pH probe woe's
[rquote=166353&tid=13044&author=dann2]Hello,
Could not get zero Volts from meter by shortin ... |
22-11-2009 at 15:53
by: densest |
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