UNCIASSIFTED
The simplest method of analysis is the direct solution of bdme ash
in HNOa, dilution to suitable volume and determination of strontiua
content by flame photometry. This method is subject to errdrs of
suppression by extraneous elements in the solution. The defree of
this svepression was determined by the addition of known quintities
of strontium to solutions of bone ash which had previously Been
messured.
The direct analysis did not he7ve eufficient. yensitivity, sq@
separation of strontium from calcium was made by a double
precipitation.
The results of the first set of tests on
bone samples are shown in Table A-3.
the
ditrate
sgiked
Table A-8
of
Samvle No.
Sr Added
1
2
3
y -
O ag
10
20
x”
S
Found.
O ag
7.5
2
26
50
L7
$s
75
100
37
94
The low recovery of the 10 ug quantity and the absence off strontium
tn the nonspiked sample is attributed to the lack of suitable aaterial to form sufficient precipitate to carry down the
tration of strontium. It is suggested that 10 ng of bargus be used
as @ collecting agent for low concentrations of stronti
Wth the carrier, the recovery for low strontium was brobzht uw to
over 90%. A set of spiked bones were mm at lower stronBium levels,
with the results shown in Table A-?.
Be
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We
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Yael
ee ae
La,
S yeBeg. wee
a:
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geet
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:
aR,
.
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Table Aw?
Strontium Recove
Sample No.
wempie
1
2
3,
S
Sr Added
ee]
O mg
1
3
5
Barium Carrier
Photometer
Re
SCL
9
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Off-acale
The bone sancle used for spiking (Amputation from Bell vue Hospital)
was shown to contain 0.019% Sr.
tts Cy
UNCLASSIFIED
00131986.053
1057082