Prepare standards
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I want to prepare a standard sample, but several substances are volatile. There is a small sample bottle specially used to prepare volatile solutions. What is the scientific name of this bottle? How many specifications are there? Thanks!
It's called an ampoule, and it seems to come in 1mL, 4mL and other sizes.
The one on the second floor seems wrong. The ampoules are the ones used by nurses! This post was last edited by zjs0536 on 2009-3-18 17:54 ]
I hope the poster can tell you about the standard sample you want to prepare, and maybe you will be able to give you a better idea.
There is a standard bottle. There is a hole in the middle of the lid. Just add a silicone pad.
We use a round-bellied ground-mouth vial with a cylindrical stopper. There is a thin hole in the middle of the stopper. The sampling needle can be inserted through the hole to take samples without opening the bottle cap every time.
It’s best to follow the standard process!
Well, I have also seen that kind of bottle, which is similar to the bottle containing dry powder penicillin, but unfortunately, I don’t know its name or specifications.
Pay attention to a few points that you can modify yourself. 1. Sealing is the key. To solve the quantitative error, weigh the sample after adding it. 2. Be proficient in calculation. You can first use a solvent to prepare a high concentration, so that after being dissolved by the solvent, less volatile will be diluted with a high concentration standard sample.
It seems that there is a standard for fuming sulfuric acid. You can check the standard. There are specific instructions on it. I have done it before, but I can’t remember clearly.
There are special completely sealed ampoules. We use Agilent, purchased directly from the manufacturer. The middle part of the bottle cap is a silicone pad, which can be used to sample or sample directly with a needle. As for the volume, because we are using 2mL, I don’t know how big it is. :)