Henry:
  Try using 5% potassium dichromate at 60ºC for 30 minutes. It has worked for me.
  René J.

"Henry, Charlene"  wrote:
  We are trying to rid the lab of all mercury products and I was wondering
what everyone is using as a mordant for the PTAH. We are currently using
4% mercuric chloride and I would like to replace it with another
mordant. 
Thanks,

Charlene Henry HT (ASCP), QIHC
Histology/Immunohistochemistry Section Head
Department of Pathology
St. Jude Children's Research Hospital
901-495-3191
fax 901-495-3100

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