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MP-1b鋅錫銅鉛礦成分分析標準物質(zhì)Zinc-tin-copper-lead Ore

Table 1 – MP-1b Certified Values
Element Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Ag μg/g 47.0 1.4 3.5 1.8
As % 2.30 0.04 0.10 0.06
Bi % 0.0954 0.0023 0.0066 0.0042
Ca % 2.47 0.05 0.15 0.09
Cd % 0.0527 0.0015 0.0034 0.0021
Cu % 3.069 0.042 0.089 0.044
Fe % 8.19 0.09 0.25 0.14
Mg % 0.024 0.003 0.006 0.004
Mo* μg/g 285 10 14 10
Pb % 2.091 0.029 0.072 0.034
S % 13.79 0.18 0.40 0.25
Si % 16.79 0.30 0.60 0.43
Sn % 1.61 0.045 0.098 0.063
Zn % 16.67 0.14 0.22 0.12
* Two acid digestions removed as method outliers based on statistical tests.

Table 2 – MP-1b Provisional Values
Element Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Al FUS* % 3.465 0.061 0.040 0.043
In μg/g 565 10 50 37
Sb μg/g 54.0 1.6 7.9 6.5
Ti FUS* % 0.0752 0.0036 0.0050 0.0059
* Various types of fusions.

For titanium the statistical analysis of the results warrants classification as Provisional, despite only 6 sets.

 

Table 3 – MP-1b Informational Values
Element Units Mean Accepted laboratories / values
AlAD* % 1.4 9/35
C** % 0.028 6/24
Co μg/g 4 3/13
Eu μg/g 1 3/15
Hf μg/g 6 3/15
K % 0.2 3/15
loss on drying % 0.2 6/22
Lu μg/g 4 3/15
Mn μg/g 480 4/20
P % 0.02 3/15
Sc μg/g 3 3/15
TiAD* % 0.03 4/14
Tb μg/g 5 3/15
Th μg/g 50 3/15
U μg/g 20 3/15
W μg/g 1100 6/23
Zr μg/g 150 3/15
* Two to four acid digestions.

** All sets by combustion – infrared spectroscopy.

Source
MP-1b is a zinc-tin-copper-lead ore from Mount Pleasant mine property, New Brunswick, Canada. The raw material was donated by Adex Minerals Corporation, and was obtained from the same mine as its predecessors, MP-1 and MP-1a, which are no longer available.

Description
The mineral species include: quartz (26.0%), sphalerite (23.7%), clinochlore (8.9%), chalcopyrite (7.2%), almandine (6.1%), arsenopyrite (4.3%), fluorite (3.8%), topaz (3.4%), galena (2.4%), cassiterite (2.3%), wolframite (2.2%), pyrite (2.1%), calcite (1.6%), pyrophyllite (1.5%), natrojarosite (1.4%), tennantite (0.9%), K-feldspar (0.7%), magnetite (0.4%), kaolinite (0.4%), loellingite (0.2%), lepidocrocite (0.2%), and bismuthinite, molybdenite, rutile, scorodite, stannite and zircon, all at 0.1%.

Intended use
MP-1b is suitable for the analysis of zinc, tin, copper, lead and various other elements at major, minor and trace levels in ores. Examples of intended use include quality control and method development.

Instructions for use
MP-1b 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.

Handling instructions
The raw material was crushed, ground and sieved to remove the plus 74 μm fraction. The product was blended, and then bottled in 200-gram units. Each bottle was purged with nitrogen and sealed in a laminated polyethylene - foil pouch. The recovery was 75%.

Homogeneity
The homogeneity of the stock was investigated using twenty-two bottles chosen according to a stratified random sampling scheme. Two splits were analyzed from each bottle. The splits were analyzed for bismuth, copper, iron, lead and silver by the digestion of 0.25-gram sample using hydrochloric, nitric, hydrofluoric and perchloric acids followed by inductively coupled plasma – optical emission spectroscopy. Sulphur in 0.15-gram samples was analyzed using a combustion apparatus with infrared detection. Use of a smaller sub-sample than specified above for these elements will invalidate the use of the certified values and associated parameters.

A one–way analysis of variance technique (ANOVA) was used to assess the homogeneity of these elements. No significant between-bottle variation was observed for bismuth, copper, iron, lead, silver and sulphur.