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Subject: Re: Best Practices for Students in Industrial Labs
Date: Mon, 30 Mar 2009 16:10:53 -0400
Author: "Dr. Jay A. Young" 		Next by Date:
Subject: Picric acid
Date: Tue, 31 Mar 2009 18:46:19 +1100
Author: Paul Dover


Date: Mon, 30 Mar 2009 16:18:52 -0400
Reply-To: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Dr. Jay A. Young" <chemsafety**At_Symbol_Here**VERIZON.NET>
Subject: Re: FW: Mercury Hazard
Comments: To: ILPI

Rob,
 
With all due respect, Prof. Haley is wrong.  Properly mixed dental amalgams do not release mercury vapor into the air in the mouth in sufficient quantities to exceed the PEL or the TLV for mercury.
 
If Haley is speaking from actual data he or someone else obtained using suitable procedures, then the dental amalgam involved was improperly administered by an incompetent dentist.
 
Jay Young
----- Original Message -----
From: ILPI
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Sent: Monday, March 30, 2009 12:34 PM
Subject: Re: [DCHAS-L] FW: Mercury Hazard

With respect to leaching from dental fillings or other amalgams, professor Boyd Haley of the University of Kentucky (and outspoken critic of the American Dental Association) told me that if you measure the vapor concentration of mercury in the mouth of a person with amalgam fillings that it exceeds the PEL for airborne mercury in the workplace.  Food for thought!

Rob Toreki

On Mar 30, 2009, at 11:57 AM, List Moderator wrote:

I was actually interested in what that 0.2% "impurity" was that kept the
mercury solid at room temperature.  Anybody know?  I'm betting that
egg-shaped mercury orb in the pool is way less than 99.8% pure.  But if
it's like amalgam dental fillings, maybe very little mercury is leached
out.  That would make sense, considering that some of these things are
probably centuries old and still look new.

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