MIL-DTL-248D
distilled water. Final sodium concentration will be approximately 0.5 ppm sodium. Calculate
exact concentration according to the following:
V S tan dard × C S tan dard
C Na1 =
Vtotal
Where :
C S tan dard = Concentrat ion of Standard (ppm)
VA1
C Na 2 =
× C Na 1
1000
Where :
VA1 = Volume of Aliquot of Stock Solution from 4.4.7.1.3. 1 or 4.4.7 .1.3.2
4.4.7.1.3.4 Standard sodium solutions for FAA. Only sodium- free distilled water shall
be used in these solutions. Transfer 0.5 ml, 1.0 ml, 1.5 ml, and 2.0 ml (equivalently 500, 1000,
1500, 2000 µl) aliquots of the stock solution from 4.4.7.1.3.1 or 4.4.7.1.3.2 into 100 ml
volumetric flasks and dilute to volume with distilled water. These solutions will contain
approximately 0.25, 0.50, 0.75, and 1.00 ppm sodium, respectively. The concentration of the
standards may be adjusted to cover the ranges experienced in the test samples. Calculate the
exact concentration according to the following:
VA1
C Na f =
× C Na 2
100
Where :
VA1 = Volume of Each Aliquot From 4.4.7 .1.3.1 or 4.4.7.1.3. 2
4.4.7.1.3.5 Standard sodium solutions for GFAA. Only sodium- free distilled water shall
be used in these solutions. Transfer 2 ml, 4 ml, 6 ml, and 8 ml aliquots of the stock solution
from 4.4.7.1.3.3 into 100 ml volumetric flasks and dilute to volume with distilled water. These
solutions will contain approximately 0.01, 0.02, 0.03, and 0.04 ppm sodium, respectively. The
concentration of the standards may be adjusted to cover the ranges experienced in the test
samples. Calculate the exact concentration according to the following:
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