Analytical Sample Bundle Metadata

1977

NGR-0014-1976-ON-LW-1

Type: lab data



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Download analytical data for this bundle in one of three formats, depending on the desired convention for treating values below the lower detection limit:

Bundle Description

NGR lake water analysis, Ontario 1976 survey, NTS 31F, U by fission track, Bondar Clegg, Ottawa

Uranium in 1976 Ontario water samples - notes from John Lynch: “These samples were analysed at Bondar-Clegg by the fission track method.  The first 500 samples were analysed for U and the data appeared quite acceptable.  The second batch of 500 samples gave values below the detection limit of 0.01 ppb.  Since these samples were collected in the vicinity of Bancroft, Ont, there was a major problem.  Loss of U on the walls of the bottle was suspected.  The Ontario samples were acidified and put aside.  All subsequent analyses using this method were done on acidified samples.  After standing for approximately 6 months with HNO3 added, the Ontario samples were re-analysed.  The control reference and many other samples exhibited appropriate U concentrations.  The precision of the control samples in these re-analysed samples was not as good as in other suites analysed that year; it was felt however to be acceptable.  For reasons not clear to me except the possible stigma, these Ontario data were never published.”

Additional notes from Steve Adcock: “The archived U data contained several values below the detection limit, including several values of zero.  Evidently, the Uranium data are in their "raw" format, as received from Bondar-Clegg.  All the reported values below the d.l., including the values of zero, were adjusted to be <d.l.”

These analytical data are published in GSC OF 406.

Sample Classification (Analytical)

IndexSample CountSurveySample TypePrep Lab MaterialControl RefUnknown SourceDuplicates count
46     Control Reference Unspecified Yes  No 
861  NGR lake sediments, NTS 31F, Ontario, 1976 (more) Fluid Untreated Water No  No  94 

Analytical Package Description

Laboratory: Bondar Clegg and Company Limited

Name: Bondar Clegg (URP surface water) FT(U) (more)

Bondar Clegg (Uranium Reconnaissance Program) surface water; fission track( uranium)

Analytical Suites:

IndexName
1  Bondar Clegg (surface water) FT (U)

Analytical Methods:

IndexColumn NameSuite OrderMethod OrderSuite RepeatQuantityUnitsDetermination Limit
1  U_FT    U  ppb 0.01  
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