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WMG-1a礦化輝長(zhǎng)巖成分分析標(biāo)準(zhǔn)物質(zhì)Mineralized Gabbro PGE Material

Table 1 - WMG-1a Certified Values
Element Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Ag μg/g 3.03 0.14 0.20 0.10
Al no AD2a % 4.75 0.06 0.12 0.05
As μg/g 5.99 0.93 0.93 0.43
Ba no AD2a μg/g 216 6 18 8
Ca no AD2a % 10.06 0.16 0.39 0.17
Co μg/g 191 5 16 6
Cr AD4b μg/g 670 40 120 80
Cr Tc μg/g 804 18 47 31
Cu μg/g 7120 120 300 120
Dy μg/g 2.291 0.060 0.060 0.042
Fe no AD2,3d % 12.71 0.20 0.56 0.23
K no AD2a % 0.1021 0.0054 0.0069 0.0038
La no AD2a μg/g 8.47 0.21 0.48 0.26
Mg no AD2a % 7.41 0.10 0.26 0.11
Mo μg/g 2.49 0.14 0.20 0.14
Na no AD2a % 0.1119 0.0043 0.0090 0.0046
Ni μg/g 2480 50 100 40
Nd μg/g 9.41 0.17 0.48 0.32
P % 0.0731 0.0032 0.0040 0.0019
Pd μg/g 0.484 0.013 0.018 0.009
Pt μg/g 0.899 0.021 0.036 0.018
S no AD e % 3.43 0.04 0.11 0.07
Sc no AD2a μg/g 21.33 0.51 1.28 0.78
Se μg/g 14.1 0.6 1.4 0.9
Si % 18.27 0.15 0.20 0.13
Sm μg/g 2.211 0.062 0.062 0.040
Sr no AD2a μg/g 39.0 1.0 3.4 1.7
Th μg/g 1.07 0.05 0.11 0.06
Ti no AD2a % 0.419 0.011 0.016 0.007
V no AD2a μg/g 158 4 13 6
Y no AD2a μg/g 12.67 0.37 0.85 0.50
Zn μg/g 112 6 17 7
Zr AD4b μg/g 35.7 1.0 2.3 1.5
Sets using digestion by two acids, usually hydrochloric and nitric acids, were excluded as method outliers based on statistical tests.
Sets using digestion using four acids, usually hydrochloric, nitric, hydrofluoric and perchloric acids, were included only based on statistical tests.
Sets by total recovery methods such as various fusions and instrumental neutron activation analyses were included only; the exclusion of sets by acid digestions as method outliers was based on statistical tests.
Sets using digestion by two or three acids, usually hydrochloric, nitric without/with hydrofluoric acid, were excluded as method outliers based on statistical tests.
Sets by combustion and fusion methods only were included.
Table 2 -WMG-1a Provisional Values
Analyte Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Aua μg/g 0.0617 0.0117 0.0117 0.0039
Bib μg/g 0.251 0.019 0.019 0.012
Cd AD4b, c μg/g 0.818 0.057 0.090 0.086
Ce no AD2a,d μg/g 17.18 0.45 0.56 0.42
Erb μg/g 1.34 0.040 0.086 0.081
Eu μg/g 0.733 0.027 0.053 0.042
Ga μg/g 12.4 0.5 3.5 1.9
Gdb μg/g 2.351 0.066 0.075 0.085
Li μg/g 44.7 1.4 7.2 4.2
Loss on ignitione % 4.31 0.08 0.33 0.22
Lub μg/g 0.196 0.007 0.012 0.013
Mn no AD2,3f μg/g 1141 21 88 37
Nb μg/g 5.26 0.22 0.36 0.29
Pbg μg/g 9.2 0.9 2.1 1.2
Prb μg/g 2.220 0.035 0.082 0.087
Rb no AD2b, h μg/g 2.53 0.07 0.14 0.13
S AD i % 3.03 0.08 0.33 0.24
Sb μg/g 1.55 0.09 0.50 0.32
Sn μg/g 1.91 0.38 0.63 0.50
Ta AD b, i μg/g 0.355 0.032 0.054 0.058
Te μg/g 1.19 0.11 0.28 0.23
Tm μg/g 0.192 0.006 0.016 0.014
U Tb, j μg/g 0.65 0.033 0.072 0.068
Yb μg/g 1.220 0.041 0.096 0.082
Data fulfilled the conditions for certification, but the element was re-classified as provisional since the within-laboratory standard deviation is 20% of the mean.
Statistical analysis of the data warrants classification as provisional despite only 6 or 7 sets of data.
Sets by digestion using four acids, usually hydrochloric, nitric, hydrofluoric and perchloric acids, were included only, based on statistical tests .
Data fulfilled the conditions for certification, but the element was re-classified as provisional since 33% of the data were outliers.
Samples of 0.5 to 2 grams dried at 950 to 1000°C for 0.5 to 12 hours included.
Sets using digestion by two or three acids, usually hydrochloric, nitric without/with hydrofluoric acids, were excluded as method outliers based on statistical tests .
Data fulfilled the conditions for certification but the element was reclassified as provisional since the between-laboratory standard deviation is 22% of the mean.
Sets using digestion by two acids, usually hydrochloric and nitric acids, were excluded as method outliers based on statistical tests.
Sets using acid digestions methods only included, based on statistical tests.
Includes only total recovery methods such as various fusions and instrumental neutron activation analysis; the exclusion of sets by acid digestions as method outliers was based on statistical tests.
Table 3 - WMG-1a Informational Values (semi-quantitative only)
Analyte Units Mean No. accepted Labor-atories / values Analyte Units Mean No. accepted Labor-atories / Values
Al AD2a % 3.3 4 / 20 Mn AD2a μg/g 350 5 / 25
Be μg/g 0.4 4 / 20 moisturee % 0.2 6 / 25
C % 0.13 4 / 20 Na AD2a % 0.02 4 / 18
Ca AD2a % 2 5 / 20 Rh FA f μg/g 0.015 4 / 20
Cd AD2a μg/g 0.6 5 / 25 Ru FANg μg/g 0.02 3 / 15
Cr AD2a μg/g 360 5 / 25 Sc AD2a μg/g 2 3 / 15
Cs μg/g 0.46 5 / 20 Sr AD2a μg/g 19 6 / 30
Fe AD2a % 9.5 4 / 20 Tb AD4 + FUSh μg/g 0.40 5 / 25
Ge μg/g 1 4 / 20 Ti AD2a % 0.2 5 / 25
Hf AD4b μg/g 1.1 3 / 15 Tl μg/g 0.1 3 / 15
Hf Tc μg/g 1.4 4 / 20 U AD i μg/g 0.44 7 / 35
Ho μg/g 0.48 7 / 35 V AD2a μg/g 54 5 / 25
In no AD2d μg/g 0.2 4 / 18 W no AD2d μg/g 0.6 4 / 20
Ir μg/g 0.027 5 / 25 Y AD2a μg/g 3.4 4 / 20
K AD2a % 0.02 4 / 20 Zr AD2a μg/g 7 5 / 25
La AD2a μg/g 3.7 3 / 15 Zr FUSj μg/g 50 5 / 25
Mg AD2a % 3.5 5 / 25  
Sets by digestion using two acids only , usually hydrochloric and nitric acids, included.
Sets by digestion using four acids only.
Sets by total recovery methods such as various fusions and instrumental neutron activation analysis only included.
Data suggests that digestions by two acids may have a lower recovery than other methods.
Samples of 1-5 grams dried at 105°C for 3 minutes to 12 hours included.
Sets by fire assay by either lead button or nickel sulphide collection only included.
Sets by fire assay using nickel sulphide collection only included.
Sets by digestion using four acids and fusions only included.
Sets by digestion only included.
Sets by fusion methods only included.
Source
WMG-1a is a mineralized gabbro with gold and platinum group elements obtained from the Wellgreen property in the Yukon, Canada.The raw material was donated by Northern Platinum Limited. The raw material for WMG-1a was obtained from the same source as its predecessor, WMG-1.
Description
The mineral species include: altaite (0.03%), amphibole (38.9%), apatite (0.4%), chalcopyrite (2.0%), clinochlore (10.0%), diopside (38.6%), ilmenite (0.1%), magnetite (0.4%), orthoclase (0.6%), otherite (0.1%), pentlandite (0.5%), pyrrhotite (6.9%) and titanite (1.6%).
Intended use
WMG-1a is suitable for the analysis of gold, platinum and palladium and various elements at major, minor and trace levels in ores. Examples of intended use include quality control and method development. Caution is advised for the use of WMG-1a for the quality control of data for gold.
Instructions for use
WMG-1a should be used “as is”, without drying. The contents of the bottle should be thoroughly mixed before taking samples. The contents of the bottle should be exposed to air for the shortest time possible. Unused material should be stored under an inert gas in a desiccator, or in a new, heat-sealed laminated foil pouch. The values herein pertain to the material when produced. CanmetMINING is not responsible for changes occurring after shipment.
Handling instructions
Normal safety precautions for handling fine particulate matter are suggested, such as the use of safety glasses, breathing protection, gloves and a laboratory coat.
Method of preparation
The raw material was dried at 32°C, crushed, ground, sieved to remove the plus 75 μm fraction. The recovery of the minus 75 μm fraction was 71%. The product was blended, and then bottled in 350-gram units. Each bottle was purged with nitrogen and sealed in a laminated polyethylene - foil pouch to prevent oxidation.
Homogeneity
The homogeneity of the stock was investigated using fifteen bottles chosen according to a stratified random sampling scheme. Three subsamples were analyzed from each bottle. The gold, platinum and palladium in 15-g subsamples were concentrated using lead fire assay and analyzed using inductively coupled plasma – mass spectrometry. Each bottle in a second set of 15 randomly chosen bottles was divided into 8 subsamples and three subsamples were analyzed. Subsamples of 0.25g grams were digested using hydrofluoric, hydrochloric, nitric and perchloric acids, and analyzed for aluminum, cobalt, copper and nickel by inductively coupled plasma – atomic emission spectrometry. Use of a smaller subsample than specified above will invalidate the use of the certified values and associated parameters.
The evidence indicates that WMG-1a is sufficiently homogeneous for use as a certified reference material.