Help Where to find the PPH video about taking a sample of N?

[The_Flying_Fox]

I know there's a video here on this site (probably in this forum) with a videoclip from the PPH where it is shown how to take a sample of liquid N from the bottle for testing. But I can't find it anymore. Can somebody please tell me where to find it? Your help would be greatly appreciated!

 

[downndone2]

I'm not sure where it is listed but most use needle and syringe

 

[The_Flying_Fox]

I'm not sure where it is listed but most use needle and syringe

When I took my sample, I first injected some air into the bottle. Because according to another, more general video about taking samples, on YouTube, that's what you're supposed to do. But now I'm worried that I contaminated my N with the air that I injected.

 

[downndone2]

I am not sure on that. Maybe wait a little bit and do another sample without air to see if it still works the same.

 

[Riddle]

When I took my sample, I first injected some air into the bottle. Because according to another, more general video about taking samples, on YouTube, that's what you're supposed to do. But now I'm worried that I contaminated my N with the air that I injected.

Yea I saw that as well, I think it is because of the air vacuum that is created or something which makes it hard to draw the liquid into the syringe because it just wants to pump back into the bottle. Though I think you probably did expose your N unfortunately by doing that, but if its just a tiny bit of air it might be alright but I honestly have no clue.

I was actually going to comment don't mess with it because if its from D then it is most likely legit and its not worth risking contamination, but then I read the rest of the thread. You can always try to cop another just in case once D is back