[Histonet] Expiration dates of ammonium sulphide

[Rene J Buesa]

Ammonium sulfide loses its activity with time. You will have to test it. Please review a recent thread on this subject in HistoNet.
René J.

From: Tony Henwood (SCHN) <tony.henwood <@t> health.nsw.gov.au>
To: histonet <histonet <@t> lists.utsouthwestern.edu> 
Sent: Thursday, January 31, 2013 6:39 PM
Subject: [Histonet] Expiration dates of ammonium sulphide

Hi all,

I have a chemical question.

We use 20% ammonium sulphide and I am wondering whether it loses its efficiency over time. Is there an expiry date on this solution and is there a test one can do to determine the concentration of aged 20% solutions?

I have searched and come up with nuthin!

Regards 
Tony Henwood JP, MSc, BAppSc, GradDipSysAnalys, CT(ASC), FFSc(RCPA) 
Laboratory Manager & Senior Scientist 
Tel: 612 9845 3306 
Fax: 612 9845 3318 
the children's hospital at westmead
Cnr Hawkesbury Road and Hainsworth Street, Westmead
Locked Bag 4001, Westmead NSW 2145, AUSTRALIA 


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