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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 results:
By boiling the solution with nitric
acid and de-emanating, and then again by collecting the
emanation for testing by boiling we obtained 1.36 -
1.46 and 1.38 x 10-8 as the quantity of radium contained
in 20 cc 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 through
we obtained 1.26 - 1.34 X 10-8 grams of redium per 20 cc
of stock solution C.
It, therefore, appears that this
solution has changed little from the initial value 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 sample 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. Fialla's value was 3.1 M 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 results:\nBy boiling the solution with nitric\nacid and de-emanating, and then again by collecting the\nemanation for testing by boiling we obtained 1.36 -\n1.46 and 1.38 x 10-8 as the quantity of radium contained\nin 20 cc 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 through\nwe obtained 1.26 - 1.34 X 10-8 grams of redium per 20 cc\nof stock solution C.\nIt, therefore, appears that this\nsolution has changed little from the initial value 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 sample 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. Fialla's value was 3.1 M 10-8.\nSincerely yours,\nVice President.\nHHBarker:RH"
}