Analytical Suite Metadata

Bondar-Clegg U NADNC



Uranium analysis of the till samples was performed using a neutron activation method with delayed neutron counting (U NADNC).  The analyses were performed by Bondar-Clegg Laboratories, in Vancouver, British Columbia.

Distinguishing characteristics:

  • U detection limit: 0.5 ppm

 

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  49     Bondar Clegg INAA + AAS + HY-AAS + F ISE + Hg-CVAAS + U NADNC + LOI
2  57     Bondar Clegg AAS, U NADNC, As col
3  309     Bondar Clegg (NGR BC stream sediment) AAS (8+6), Ba (XRF), CVAAS (Hg), W, LOI, F, U(10**12)
4  421     Bondar Clegg (NGR lake sediment) AAS 8+6+Ba (HCLO4 only)), CVAAS (Hg),W, LOI, F, U(10**12)
5  422     Bondar Clegg (NGR stream sediment) AAS (8+6), Ba (HClO4 only), CVAAS (Hg), W, LOI, F, U(10**12)
6  423     Bondar Clegg (NGR lake sediment) AAS (8+5), CVAAS (Hg), LOI, F, U(10**12)
7  426     Bondar Clegg (NGR stream sediment) AAS (8+6), DCP (Ba), CVAAS (Hg), W, LOI, F, U
8  427     Bondar Clegg (NGR stream sediment) AAS(8+6), DCP (Ba), CV(Hg), COL (W), LOI at 500°C, F, U
9  429     Bondar Clegg (NGR lake sediment) AAS (8+5), CV(Hg), LOI at 500C, F, U - 10**12 flux
10  439     Bondar Clegg (NGR stream sediment) AAS(8+6), CV(Hg), LOI, F, U
11  440     Bondar Clegg (NGR lake sediment) AAS (8+3+(Mo+V: 2.5 ml conc)), CVAAS (Hg), LOI, F, U(10**12)
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