If you have an atomic absorption spectrometer available, you can dissolve
the tissue in nitric acid, almost neutralize the solution with potassium
hydroxide, and spray a drop of it into the spectrometer flame.  Arsenic
absorbs at 197 nm.  This is sensitive and quantitative.  You will probably
need help running the spectrometer.
Any qualitative analysis lab manual will tell you how to do a qualitative
test for arsenic (usually the Marsh test or a modification of it).
					Allen A. Smith
					School of Graduate Medical Sciences 
					Barry University
					Miami Shores, FL  33161

		-----Original Message-----
		From:	Valleygal@aol.com [mailto:Valleygal@aol.com]
		Sent:	Tuesday, February 22, 2000 1:27 PM
		To:	Histonet@pathology.swmed.edu
		Subject:	arsenic

		Does anybody know of a procedure (not a recipe!!) to
demonstrate arsenic in tissues?
		Thanks!
		Andi