Analytical Suite Metadata

Barringer (lake and stream  sediment) NADNC(U)



Barringer, lake and stream sediment; NADNC(uranium)

General Methodology:

Uranium was determined using a neutron activation method with delayed neutron counting.  A detailed description of the method is provided by Boulanger et al. (1975).  In brief, a 1 gram sample is weighed into a 7 dram polyethylene vial, capped and sealed.  The irradiation is provided by the Slowpoke reactor with an operating flux of 10** 12 neutrons/sq cm/sec.  The samples are pneumatically transferred from an automatic loader to the reactor, where each sample is irradiated for 60 seconds.  After irradiation, the sample is again transferred pneumatically to the counting facility where after a 10 second delay the sample is counted for 60 seconds with six BF3 detector tubes embedded in paraffin.  Following counting, the samples are automatically ejected into a shielded storage container.  Calibration is carried out twice a day as a minimum, using natural materials of known uranium concentration.

Reference:

Boulanger, A., Evans, D.J.R. and Raby, B.F. (1975).  Uranium analysis by neutron activation delayed neutron counting. Proc. of the 7th Annual Symp of Canadian Mineral Analysts, Thunder Bay, Ontario, Sept 22-23, 1975.

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Radiochemical methods >> Activation analysis >> Neutron activation >> Fission >> Delayed Neutron Counting

Children

None


Analytical Decomposition:

Hierarchical classification

Decomposition >> None

Children

None


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  1013     U_NADNC  0.5

Associated Analytical Packages:

IndexPackage IDPackage Name
1  396     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), COL(W), LOI500, ISE(F), NADNC(U)
2  398     Barringer (NGR stream sediment, NB, 1985) AAS (8+7), CVAAS (Hg), COL(W), LOI500, ISE(F), U
3  400     Barringer (NGR lake sediment) AAS (8+Cd+As+Mo+V+Sb), CVAAS (Hg), LOI500, ISE(F), NADNC(U)
4  401     Barringer (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI500, NADNC(U)
5  405     Barringer (NGR stream sediment, BC, 1985) AAS (8+7), CVAAS (Hg), COL(W), LOI500, ISE(F), U
6  430     Barringer (NGR lake sediment) AAS(8+6), DCP(Ba), CV(Hg), LOI, W, F, U
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