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March 6th,1929.
Dr. Herman Schlundt,
University of Missouri,
Columbia, Mo.
Dear Dr. Schlundt:
We have completed the examination
of the standard radium solution which you submitted to
us and I beg to herewith report the following resulta:
By boiling the solution with nitric
acid and de-emanating, and then again by collecting the
emonation for teuting by boiling we obtained 1.36 -
1.46 and 1.38 X 10-8 as the quantity of radium contained
in 20 ce of the stock solution C.
When the solution is
de-emanated by the bubbling of air through same, and again
collecting the carnation for test by drawing air thpough
we obtained 1.26 - 1.34 x 10-8 grans of redium per 20 co
of stock solution C.
It, ,therefore, aupears that this
solution has changed little from the initial falue when
the emanation is collected by the nitric acid method, but
there is a slight loss involved when collected by bubbling.
On Dr. Fialla's semple we find by
the nitric acid method 2.5 x 10-8 grams of radium per cc,
and by bubbling air through the solution 2.6 X 10-8.
Dr. Fialia's value was 3.1 = 10-8.
Sincerely yours,
Vice President.
HHBarker: RH
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"ocrText": "March 6th,1929.\nDr. Herman Schlundt,\nUniversity of Missouri,\nColumbia, Mo.\nDear Dr. Schlundt:\nWe have completed the examination\nof the standard radium solution which you submitted to\nus and I beg to herewith report the following resulta:\nBy boiling the solution with nitric\nacid and de-emanating, and then again by collecting the\nemonation for teuting by boiling we obtained 1.36 -\n1.46 and 1.38 X 10-8 as the quantity of radium contained\nin 20 ce of the stock solution C.\nWhen the solution is\nde-emanated by the bubbling of air through same, and again\ncollecting the carnation for test by drawing air thpough\nwe obtained 1.26 - 1.34 x 10-8 grans of redium per 20 co\nof stock solution C.\nIt, ,therefore, aupears that this\nsolution has changed little from the initial falue when\nthe emanation is collected by the nitric acid method, but\nthere is a slight loss involved when collected by bubbling.\nOn Dr. Fialla's semple we find by\nthe nitric acid method 2.5 x 10-8 grams of radium per cc,\nand by bubbling air through the solution 2.6 X 10-8.\nDr. Fialia's value was 3.1 = 10-8.\nSincerely yours,\nVice President.\nHHBarker: RH"
}