Analytical Suite Metadata

INRS/McMaster INAA (low DL)



Instrumental neutron activation analysis of 29 trace elements was performed on the till fractions.  These analyses were done by the Institut national de la recherche scientifique- Géoressources (INRS) on a 3-monitor reactor at McMaster University.

Distinguishing characteristic : 2 hour count, low detection limits

General Methodology:

Depending on sample density, 3 to 7 g of the sample were capped in 7 ml plastic containers.  Samples were irradiated at McMaster University's 3 monitor reactor.  A batch irradiation consisted of 21 samples and a standard (GTS-1).  The delay between irradiation and counting was 5 to 8 days.  A single 2 hour count (7 200 s) was performed on each sample.  The distance between the sample and the detector was 2 cm.  The proposed "detection limit" was calculated at the 3σ level.  Measurement error for concentrations greater than 10 times the detection limit is: ± detection limit + 5% of the measured value.  Below this concentration, measurement error increases.

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Radiochemical methods >> Activation analysis >> Neutron activation >> INAA

Children

PGNAA | DGNAA


Analytical Decomposition:

Hierarchical classification

Decomposition >> None

Children

None


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  3075     Ag_INA  2
2  3076     As_INA  0.5
3  3077     Au_INA  2
4  3078     Ba_INA  50
5  3079     Br_INA  0.5
6  3080     Ce_INA  2
7  3081     Co_INA  5
8  3082     Cr_INA  20
9  3083     Cs_INA  0.5
10  10  3084     Eu_INA  0.2
11  11  3085     Fe_INA  0.025
12  12  3086     Hf_INA  0.5
13  13  3087     Ho_INA  0.5
14  14  3088     La_INA  2
15  15  3089     Lu_INA  0.1
16  16  3090     Mo_INA  1
17  17  3091     Nd_INA  5
18  18  3092     Ni_INA  50
19  19  3093     Rb_INA  5
20  20  3094     Sb_INA  0.1
21  21  3095     Sc_INA  0.2
22  22  3096     Sm_INA  0.1
23  23  3097     Ta_INA  0.5
24  24  3098     Tb_INA  0.2
25  25  3099     Th_INA  0.2
26  26  3100     U_INA  0.5
27  27  3101     W_INA  1
28  28  3102     Yb_INA  0.2
29  29  3103     Zr_INA  200

Associated Analytical Packages:

IndexPackage IDPackage Name
1  11     INRS XRF + INAA (low detection limits)
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