All Questions
8
questions
2
votes
0
answers
54
views
Best bet for separating fused glassware
I have a sintered glass funnel stuck in a flask with a 24/40 ground glass joint.
I regularly used this glassware to process very dilute solutions of uncured photopolymer resin dissolved in ethanol. ...
- 1,172
2
votes
0
answers
94
views
Appropriate ways to remove aluminum from the surface of glass?
I'm looking for a way to treat the surface of borosilicate glassware such that it won't contaminate solutions of puriss reagents in conditions that pure $\ce{SiO2}$ wouldn't, yet keep the bulk ...
- 1,097
1
vote
1
answer
244
views
Removing PTFE marks on glass bottles after using magnetic stir bars
I am using magnetic stir bars to agitate solutions for 4 weeks at a time. I have noticed at the bottom of the glass bottles that white marks have accumulated where the stir bar spins. Even with ...
- 11
3
votes
1
answer
151
views
What are the best cleaning agents for carbon residues on glassware?
Introduction
Recenly I wanted to isolate some ascorbic acid (Vitamin C or chemically - $\ce{C6H8O6}$). I've put the filtered solution (I had to filter it because of the binder) in a flask and heated ...
- 376
4
votes
1
answer
616
views
Solvents for tartrates / tannins that won't attack glass
At the bottom of my wine decanter (which due to its shape is fantastically hard to clean mechanically) a layer of reddish brown precipitate forms. I believe this is probably potassium bitartrate ...
- 189
2
votes
1
answer
2k
views
Autoclaving certain plastics?
My professor is letting me use the autoclave in the future, but I am a novice. I asked him what materials were safe to autoclave for my notes, materials meaning glass or plastic-ware. He stated, "...
- 229
4
votes
1
answer
330
views
How to clean glassware containing pesticide solutions
I have pesticide (dimethoate) dissolved in methanol in volumetric flasks and graduated cylinders. How do I clean this glassware properly before moving on to the next dilution of a different pesticide.
- 91
2
votes
4
answers
8k
views
How can I clean solid sulfur and its oxides from test tube?
I was experimenting with sulfur few years ago. The test tube I used for that purpose has still sulfur stuck onto it. I was searching for a way to dissolve it.
I found an idea to try warm acetone. ...
- 2,518