HgCl2 or NaN3?

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daxiongmao
daxiongmao's picture
HgCl2 or NaN3?

I need a poison to perserve organic acids from decomposition by bacteria in water samples.
I find that  NaN3 (sodium azide) or HgCl2 can be used through seeking from research papers.
But i  find that NaN3  solid matter can explode when it is shocked , hitted or heated.  And HgC l2
is easy to volatilize to poisonous gas. They are too dangerous to be taken by a plane.
How can i take one of them to collcet water samples thousand kilometers away from my lab?
or can you introduce a better poison to me?
 

Satinder
Satinder's picture
Hi Daxiongmao

Hi Daxiongmao
The easiest way will be to purchase either of the two from the location where you are going.
In case if that is not possible, prepare a stock olution of soium azide ( which is toxic and fayal at 10mg/ kg body weight but doesnt carry the hazard of explosion etc. )