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UNIVERSITY OF MISSOURI
COLUMBIA
DEPARTMENT OF CHEMISTRY
December 22, 1930
Mr. H. H. Barker
United States Radium Corporation
535 Pearl Street
DEC 261930
New York City, New York
My dear Barker:
Enclosed is an inventory of feces and urine residues
received to date. You state in your letter of December 17, that
three sets of specimens should have been received. The third set
is probably in Dr. Turner's hands still.
So far I have made only alpha ray comparisons on the
specimens. A portion of composited residues was spread on a metal
plate so as to secure a film of the specimen about 05 mm. deep.
In case there is a. decided increase in elimination of radium fol-
lowing the first administration of parathormone the second series
of specimens should show a marked increase in activity by this quali-
tative method of testing. No uniform increase was observed. Feces
ash of Miss Freyer showed an increased activity, but the feces ash
of Mrs. Hussman and Mrs. La Rice showed a decrease. The measurements
of Miss Schaub's samples have not been completed. The net drifts of
this series are of the same order of magnitude as the values obtained
with the feces ash and urine residues collected in February, 1929, at
the Marseilles Hotel. So I assume that the radium content will come
out about the same, when we make the determinations by the emanation
method.
The urine residues range in weight from 18 to 32 grams.
The activity is low. Perhaps a half or a third of the urine sample
will be enough for a determination of radium by emanation method, but
the radium content is so low, that the increase in drift will be small
for all urine samples.
In making radium determinations on feces ash I shall di-
vide the specimen, thus getting duplicate values. The weight of the
samples permits this. Their weights range from 3,5 to 7.5 grams. I
expect to follow the method of de-emanating by dissolving in nitrio
acid, or fusing with bisulfate, and them separation of emanation
accumulated during a definite period of storage. In the former series
of determination (1929) where the emanation was collected directly as
the sample was put in solution the values ran somewhat lower than by storage.
It seems to me that the elimination of a few micrograms
of radium during a period of several weeks, should show a decided in-
crease in alpha ray activity of feces ash; and surely by the emanation
method, for, even a millimicrocurie of radon produces a distinct in-
crease in drift.
UNIVERSITY OF MISSOURI
COLUMBIA
DEPARTMENT OF CHEMISTRY
December 22, 1930
Mr. Barker - 2
A three day specimen of stools is desirable, for it
will be advisable to hold in reserve a third of the ash. In case
some question should arise concerning our radium values, we may
then draw upon the reserve sample.
Sincerely yours,
Herman Schlundt
Herman Schlundt
HS:AS
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"ocrText": "UNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\nDecember 22, 1930\nMr. H. H. Barker\nUnited States Radium Corporation\n535 Pearl Street\nDEC 261930\nNew York City, New York\nMy dear Barker:\nEnclosed is an inventory of feces and urine residues\nreceived to date. You state in your letter of December 17, that\nthree sets of specimens should have been received. The third set\nis probably in Dr. Turner's hands still.\nSo far I have made only alpha ray comparisons on the\nspecimens. A portion of composited residues was spread on a metal\nplate so as to secure a film of the specimen about 05 mm. deep.\nIn case there is a. decided increase in elimination of radium fol-\nlowing the first administration of parathormone the second series\nof specimens should show a marked increase in activity by this quali-\ntative method of testing. No uniform increase was observed. Feces\nash of Miss Freyer showed an increased activity, but the feces ash\nof Mrs. Hussman and Mrs. La Rice showed a decrease. The measurements\nof Miss Schaub's samples have not been completed. The net drifts of\nthis series are of the same order of magnitude as the values obtained\nwith the feces ash and urine residues collected in February, 1929, at\nthe Marseilles Hotel. So I assume that the radium content will come\nout about the same, when we make the determinations by the emanation\nmethod.\nThe urine residues range in weight from 18 to 32 grams.\nThe activity is low. Perhaps a half or a third of the urine sample\nwill be enough for a determination of radium by emanation method, but\nthe radium content is so low, that the increase in drift will be small\nfor all urine samples.\nIn making radium determinations on feces ash I shall di-\nvide the specimen, thus getting duplicate values. The weight of the\nsamples permits this. Their weights range from 3,5 to 7.5 grams. I\nexpect to follow the method of de-emanating by dissolving in nitrio\nacid, or fusing with bisulfate, and them separation of emanation\naccumulated during a definite period of storage. In the former series\nof determination (1929) where the emanation was collected directly as\nthe sample was put in solution the values ran somewhat lower than by storage.\nIt seems to me that the elimination of a few micrograms\nof radium during a period of several weeks, should show a decided in-\ncrease in alpha ray activity of feces ash; and surely by the emanation\nmethod, for, even a millimicrocurie of radon produces a distinct in-\ncrease in drift.\nUNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\nDecember 22, 1930\nMr. Barker - 2\nA three day specimen of stools is desirable, for it\nwill be advisable to hold in reserve a third of the ash. In case\nsome question should arise concerning our radium values, we may\nthen draw upon the reserve sample.\nSincerely yours,\nHerman Schlundt\nHerman Schlundt\nHS:AS"
}