We buy most of our supplies from SLS (science2education.co.uk). They are quite competitive with pricing anyway, but if you have a decent sized order it's worthwhile speaking to a rep. We've had issues in the past with the quality of some chemicals from cheaper supplies. Never had a problem with SLS
I've just bought hundreds of these from SLS although they are the narrow neck version:
They're cheaper than Better Equipped and if you have a large order, it's worth contacting a rep to see if you can get discount
We're replacing our dataloggers due to system upgrades in school. I'm looking to sell:
Interfaces x6 (maybe 1 or 2 more)
Current probe x1
Voltage probe x1
Temperature probe x9
Temperature probe (high temp thermocouple) x16
Light gates x4 pairs
Light level x12
Movement and position sensor x1
Just trialled this today- caffeine didn’t show up for me with iodine vapour but showed under UV light. I used 10:9:1 ethyl ethanoate:hexane:ethanoic acid and the aspirin just dissolved and didn’t show. Reduced the amount of ethyl ethanoate to 2:9:1 and it mostly worked although the deparation...
I used them for the first time over the summer. I had a rep come in to demo some equipment to us and she took the list of stuff I was ordering for the year and gave me a quote. We ended up saving quite a bit of money and the quality of their chemicals was a lot better than some other suppliers...
We do this with A level psychology. We buy a pack of 4 brains from samples for schools and preserve one or two ourselves in formaldehyde (guidance on this from CLEAPSS) and then defrost one of the ones we don't preserve to show what it actually looks like
I have benches with cupboards underneath around the outside of 2/3 of the room, and gratnell racking arranged in 'bays' in the other 1/3. On one wall I have cupboards on the wall which are useful for somethings but aren't that deep so can be a little bit awkward. The under bench cupboards are...