On Fri, 04 Apr 2008 09:29:13 GMT, "Arfa Daily"
wrote:
Apparently, in America, they crushed the glass to powder or some such to try
to prove this. I'm sure that someone from that side of the pond, knows the
details.
Yep. I sorta covered the topic previously:
http://groups.google.com/group/sci.electronics.repair/msg/e60cf96df9bfb75b
http://groups.google.com/group/sci.electronics.repair/msg/16de8814c32844b5
Is this Ban Really Necessary?
A Critical Investigation of the CRT Ban
http://www.wrppn.org/hub/hub36/Is_this_ban_necessary_CRT_.pdf
The actual EPA procedure is not really specific to CRT's.
http://www.epa.gov/sw-846/pdfs/1311.pdf
Here's a summary of the CRT testing procedure and some results:
http://www.hinkleycenter.com/publications/lead_leachability_99-5.pdf
(See Methodology starting on page 7).
"Once divided, each section was reduced in size as required by EPA
SW846 method 1311, the Toxicity Characteristic Leaching Procedure.
The TCLP is the test prescribed by the U.S. EPA to determine whether a
solid waste is hazardous by the toxicity characteristic. Each division
of a tube was tested separately (i.e. the neck, funnel, and faceplate
were analyzed individually). A sample of glass, from 200 to 500 grams,
was placed in a stainless steel bowl. The glass was covered by a cloth
for protection from airborne glass, and manually crushed with a
standard hammer. Intermittently, the glass was separated through a
9.5-mm sieve and the remaining large fraction returned to the bowl for
further crushing. The remainder of the glass (that not crushed) was
saved. For the face and funnel fractions, the remaining material mass
was often large (relative to the amount crushed the test). The rest of
method 1311 was completed and the leachate was digested and analyzed
for lead using SW846 methods 3010A and 7420."
In other words, pulverize the glass and then test for lead leaching
into various pH caustics.
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