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RE: Calibration Standards data



Grant,

Here are two references I had at hand.

"The Storage of Radioactive Solutions with Standardised Disintegration
Rates," G. C. Lowenthal and H. A. Wyllie, Nuclear Instruments and Methods,
V112, pp 367-371, 1973.

"A Review of Procedures for the Dispensing, Dilution, and Storage of Liquid
Radioactivity Standards," Robert C. McFarland, Radioactivity and
Radiochemistry, pp. 18-21, Fall 1990.

I hope you find these useful, but I'm sure that others must have more
up-to-date references.

Jerry

The above comments and opinions are mine and mine alone. They do not
intentionally represent the views of any other being, living, dead, or
yet-to-be.

Jerry Falo, Ph.D., CHP
HMJF Professional Associate
Health Physics Program
USACHPPM
410-436-3548
gerald.falo@apg.amedd.army.mil


-----Original Message-----

Radsafers,

I am evaluating calibration standards that have been stored in HDPE
containers. The solutions are in the 3-4 N acid range and are from 3-8 years
old.  Has anyone encountered plating out or diffusion of nuclides into
plastic? How will prolonged acid exposure change the nature of the
permeability of the polyethylene?  Is there any hard and fast data out there
on plastic bottle storage vs. stability?

Grant Wilton
Senior Research Scientist
Southwest Research Institute
gwilton@chem.swri.edu

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