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Magpie
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new toys
Here's a picture of some long sought after lab equipment I gave myself for Christmas:
This is indicating Drietite. No more use of swimming pool CaCl2.
Also shown is a small Brazilian agate mortar & pestle for use in preparing solids for a melting point. No more using my huge 4" Coors porcelain
mortar & pestle.
The single most important condition for a successful synthesis is good mixing - Nicodem
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Magpie
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Here's a picture of an Atago Abbé refractometer I recently acquired off eBay for $150 including shipping. Atago thinks it was made ca 1963. It came
in a nice wood case which included a small crystal block labeled ND= 1.5163.
Although I've had to do some calibration it seems to be working fine. I always worry about buying something that old and complex from an antique
dealer.
I calibrated it with water at ND=1.3329. When I checked glycerol it read very close to the Wiki value of ND=1.4746. I don't
yet know how to measure the ND of the supplied crystal.
If you have any questions about this instrument I'll try to answer them.
The single most important condition for a successful synthesis is good mixing - Nicodem
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gsd
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Wow! The refractometer looks beautiful. @ $ 150 delivered it is a steal.
I am bit confused about the first picture though. what is the Christmas Present - the Pestle & Mortar or the Drierite Bottle? ;-)
gsd
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JJay
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Here is my new flask.
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Magpie
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Quote: Originally posted by gsd  | Wow! The refractometer looks beautiful. @ $ 150 delivered it is a steal.
I am bit confused about the first picture though. what is the Christmas Present - the Pestle & Mortar or the Drierite Bottle? ;-)
gsd |
Thank you gsd. I'm glad someone has an appreciation for these old instruments. Atago USA trying to find some more information on this item.
The Drierite and the mortar/pestle are both new items.
The single most important condition for a successful synthesis is good mixing - Nicodem
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Morgan
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| Quote: Originally posted by Magpie | Here's a picture of some long sought after lab equipment I gave myself for Christmas:
This is indicating Drietite. No more use of swimming pool CaCl2.
Also shown is a small Brazilian agate mortar & pestle for use in preparing solids for a melting point. No more using my huge 4" Coors porcelain
mortar & pestle. |
I have sort of the same problem, a mortar and pestle my sister gave me that she no longer wanted that was for her kitchen presumably. It's nice to
look at but what might it best be used for? It's 11 inches across and 6 high and the pestle about 10.5. It's marked Coors 520-6.
  
[Edited on 8-2-2016 by Morgan]
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Dr.Bob
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It (huge mortar and pestle) would best be used to grind up a huge amount of anything. It is nice to have a few of them, so you can handle any
amount of stuff. I have a nice one that is great for grinding up NaOH or K2CO3 into powder for reactions where you need a fine powder.
The agate ones are nice as they are not porous, so they are easier to clean and you don't loose material in their pores. They are great for small
samples.
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blogfast25
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| Quote: Originally posted by Magpie |
Thank you gsd. I'm glad someone has an appreciation for these old instruments. Atago USA trying to find some more information on this item.
The Drierite and the mortar/pestle are both new items. |
I luuuurrve these old instruments. I bought an old spectroscope a year ago.
Try working out the range of nD that it can handle?
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Magpie
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Is that a question for me? My instrument reads from ND 1.3 to 1.7, which I think is typical for an Abbé.
[Edited on 9-2-2016 by Magpie]
edited to correct the range to 1.3 - 1.7.
[Edited on 9-2-2016 by Magpie]
The single most important condition for a successful synthesis is good mixing - Nicodem
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blogfast25
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| Quote: Originally posted by Magpie |
Is that a question for me? IIRC my instrument reads from about ND 1.3 to 1.5, which I think is typical for an Abbé.
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Yes, it was, thanks. Quite narrow range in a sense (but I'm no expert on refractometry).
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Magpie
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Recently I burned out my 5/12vdc power supply (salvaged from an old computer) by exceeding its 145w power limitation. This gave me the justification
to buy what I've always really wanted anyway: a regulated linear power supply capable of holding up to 30vdc or 30adc. It just arrived today, as
shown below:
The single most important condition for a successful synthesis is good mixing - Nicodem
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JJay
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That is a nice power supply!
I got a vacuum pump. Now I just have to figure out how to connect the flare fittings to a hose barb... it can't be that hard, right?
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Texium
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| Quote: Originally posted by JJay | | I got a vacuum pump. Now I just have to figure out how to connect the flare fittings to a hose barb... it can't be that hard, right?
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Not hard at all. Home Depot sells the part you need in the plumbing section. Wrap the threads with PTFE tape
for a nice tight seal and you're good to go.
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JJay
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| Quote: Originally posted by zts16 | | Quote: Originally posted by JJay | | I got a vacuum pump. Now I just have to figure out how to connect the flare fittings to a hose barb... it can't be that hard, right?
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Not hard at all. Home Depot sells the part you need in the plumbing section. Wrap the threads with PTFE tape
for a nice tight seal and you're good to go. |
That is what I was thinking, but if you talk to a professional supplier of such parts, they treat as though you are doing some sort of dark sorcery
that is officially frowned upon by the Plumbers Guild, the Heating Installers Conclave and the Refrigeration Coven.
I'll stop by Home Depot later.
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Funkerman23
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Looks like a deschem offering to me. So far so good on my end with them but I stopped buying large flasks awhile ago with small center joints. Try a 2
0r 3 liter with a 45/50 or similar joint in the middle& a reducing adapter. With the adapter I never looked back.
" the Modern Chemist is inundated with literature"-Unknown
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JJay
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| Quote: Originally posted by Funkerman23 |
Looks like a deschem offering to me. So far so good on my end with them but I stopped buying large flasks awhile ago with small center joints. Try a 2
0r 3 liter with a 45/50 or similar joint in the middle& a reducing adapter. With the adapter I never looked back. |
It's a Deschem flask. I posted about it a long time ago before there was a glassware thread, but that is my favorite flask, and I have used it in
dozens of reactions and distillations. Right now it has a thin layer of clay on the bottom that has defied removal with all common measures, so I am
going to try scrubbing it and bought some copper scrubbers for the task. Eventually the flask will probably break, and I use it a lot, so I picked up
a 4-neck 3L from Nanshin as a backup.
I actually have a 40/50 reducing adapter, but I just use it for my Soxhlet and my distillation bulb. I certainly wouldn't mind having one of those
reaction vessels with a clamp-on top, though. In general, I try to avoid using adapters unless they are absolutely necessary.
The parts I picked up at Home Depot didn't quite fit the small valve on my pump (I think it's metric or something), but I did find a brake fitting
that connects to the large one at Napa Auto Parts. It also connects nicely with the Home Depot hose barb. I used lots of plumber's tape and tightened
the fittings onto the pump tightly enough that they will be hard to remove.
[Edited on 21-4-2017 by JJay]
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Sulaiman
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"Right now it has a thin layer of clay on the bottom that has defied removal with all common measures"
I would try swirling and shaking (or better, mag-stirring) sand, water and a little NaOH in the flask
CAUTION : Hobby Chemist, not Professional or even Amateur
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XeonTheMGPony
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I just made a 105 dollar order from deschem, so far they been a seemingly good quality source (Good quality being relative to Chinese suppliers!)
His stuff fits for the most part and is priced to its value so can't complain there!
The Alanhin condenser I got has held up very well as have the 500ml flask I ordered.
Will post pics when it arrives in a month.
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Brom
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Here are a couple of things i recently acquired. A Hamilton gas syringe, and some nitrocellulose filters. I am going to try to sell the filters on
ebay as i have no use for them.
 
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Geocachmaster
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I happened across a yard sale today and found some good stuff!
A central scientific hotplate
A heat gun
Fisher Pasteur pipets
And best of all...
Fischer technical LAV-3 vacuum pump, holy crap it's $600 for a new one on Amazon. It works and is in very good condition, other than a bunch of dust.
I got everything here for a grand total of $8
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j_sum1
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Score! Well done, Geo. I'd do that for eight bucks too if I had the chance.
My latest purchase:
I have had one of these on my ebay wish list for about a year but always the price has been exorbitant and the shipping ridiculous: in some cases more
than the purchase price. This was 33 aussibucks with free shipping.
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JJay
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I have one of those, but I bought the absolute cheapest one on eBay and ended up with one that needed some repairs and didn't have a coaster and
doesn't always go up and down smoothly... still, I do use it a lot.
I also have a smaller one that is high quality, but I hardly ever use it.
Eight bucks for that stuff was a fantastic deal!
[Edited on 24-4-2017 by JJay]
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JJay
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![IMG_20170425_232139[1].jpg - 578kB](https://www.sciencemadness.org/whisper/files.php?pid=481557&aid=58813) ![IMG_20170425_232202[1].jpg - 475kB](https://www.sciencemadness.org/whisper/files.php?pid=481557&aid=58815)
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JJay
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Milligram scale.
![IMG_20170426_135741[1].jpg - 494kB](https://www.sciencemadness.org/whisper/files.php?pid=481619&aid=58821)
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Atrum
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I have that exact balance. 
"Experience is my one true mistress and I will cite her in all cases. Only through experimentation can we all truly know anything." ~Leonardo da Vinci
My inventory
Recently acquired elements: Iodine , Cobalt, Tungsten, Silicon |
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