Analytical Suite Metadata

ActLabs Au+48 1H ( INAA + ICP-ES)



Au+48 1H: INAA on 30g aliquot for selected metals and rare earth elements; near-total digestion ICP-ES on 25g aliquot on remaining elements

General Methodology:

Actlabs Au+48 1H

This combination of INA and ICP-ES analyses is designed to provide a trace element scan for virtually all types of economic mineralisation.  It is a combination of Actlabs “Code 1D enhanced” (INAA) and “Code 1F” (4 acid digestion ICP-ES).

INAA Portion

A 30 g aliquot, if available, is encapsulated in a polyethylene vial and irradiated with flux wires and an internal standard (1 for 11 samples) at a thermal neutron flux of 7 x 1012 n cm-2 s-1.  After a 7-day decay to allow Na-24 to decay the samples are counted on a high purity Ge detector with resolution of better than 1.7 KeV for the 1332 KeV Co-60 photopeak.  Using the flux wires, the decay-corrected activities are compared to a calibration developed from multiple certified international reference materials.  The standard present is only a check on accuracy and is not used for calibration purposes. 10 to 30% of the samples are rechecked by re-measurement.

One standard is run for every 11 samples.  One blank is analyzed per work order.  Selected duplicates are analysed when enough material is submitted.

Further details are available on isotopes and gamma-ray energies used in Hoffman, E.L. (1992). Instrumental Neutron Activation in Geoanalysis. Journal of Geochemical Exploration, volume 44, pp. 297-319.

Total Digestion – ICP-ES Portion

A 0.25 g aliquot of sample is digested in HClO4-HNO3-HCl-HF at 260°C to fuming and is diluted with dilute HCl.  This leach is partial for magnetite, chromite, barite, spinels, zircon and massive sulphides.  The solutions are read on a Varian Vista or Varian 735ES ICP. Reported QC includes a blank analysis frequency of 2%, 1 for every 40 or less samples, a sample replicate frequency of 7%, 1 for every 15 or less samples, and 6% or more are analyzed international standards.  Additionally there is an internal method QC with a frequency of 20%.

INAA on 30g aliquot for selected metals and rare earth elements; total digestion ICP-MS on 25g aliquot on remaining elements.

INA results (28): Au, As, Br, Ce, Co, Cr, Cs, Eu, Fe, Hf, Hg, Ir, La, Lu, Na, Nd, Rb, Sb, Sc, Se, Sm, Sn, Ta, Tb, Th, U, W, Yb

ICP-ES results (17): Al, Be, Bi, Ca, Cd, Cu, K, Mg, Mn, Mo, P, Pb, S, Sr, Ti, V, Y

INA and ICP-ES results (4): Ag, Ba, Ni, Zn

[Description taken from ActLabs 2011 Canadian Schedule of Services and Fees]

Instrument: unstated

Sample material: solid

Sample weight: unstated


Analytical Technique:

Hierarchical classification

Technique >> Other >> INA/ICP-MS

Children

None


Analytical Decomposition:

Hierarchical classification

Multiple

Children

None


Analytical Methods:

IndexMethod OrderMethod IDQuantityDetection Limit
1  2002     Au_INA  2
2  2003     Ag_Mix  0.3
3  2004     Al_ICP  0.01
4  2005     As_INA  0.5
5  2006     Ba_Mix  50
6  2007     Be_ICP  1
7  2008     Bi_ICP  2
8  2009     Br_INA  0.5
9  2010     Ca_ICP  0.01
10  10  2011     Cd_ICP  0.3
11  11  2012     Ce_INA  3
12  12  2013     Co_INA  1
13  13  2014     Cr_INA  2
14  14  2015     Cs_INA  1
15  15  2016     Cu_ICP  1
16  16  2017     Eu_INA  0.2
17  17  2018     Fe_INA  0.01
18  18  2019     Hf_INA  1
19  19  2020     Hg_INA  1
20  20  2021     Ir_INA  5
21  21  2022     K_ICP  0.01
22  22  2023     La_INA  0.5
23  23  2024     Lu_INA  0.05
24  24  2025     Mg_ICP  0.01
25  25  2026     Mn_ICP  1
26  26  2027     Mo_ICP  1
27  27  2028     Na_INA  0.01
28  28  2029     Nd_INA  5
29  29  2030     Ni_Mix  1
30  30  2031     P_ICP  0.001
31  31  2032     Pb_ICP  3
32  32  2033     Rb_INA  15
33  33  2034     S_ICP  0.01
34  34  2035     Sb_INA  0.1
35  35  2036     Sc_INA  0.1
36  36  2037     Se_INA  3
37  37  2038     Sm_INA  0.1
38  38  2039     Sn_INA  0.01
39  39  2040     Sr_ICP  1
40  40  2041     Ta_INA  0.5
41  41  2042     Tb_INA  0.5
42  42  2043     Th_INA  0.2
43  43  2044     Ti_ICP  0.01
44  44  2045     U_INA  0.5
45  45  2046     V_ICP  2
46  46  2047     W_INA  1
47  47  2048     Y_ICP  1
48  48  2049     Yb_INA  0.2
49  49  2050     Zn_Mix  1
50  50  2180     Wt_INA 

Associated Analytical Packages:

IndexPackage IDPackage Name
1  500     ActLabs 1H (Au+48) and 1C-EXP2 (Au, Pt, Pd)
Date modified: