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REE-1稀土鋯礦石和鈮礦石成分分析標(biāo)準(zhǔn)物質(zhì)REEs, Zr and Nb ore

Table 1 – REE-1 Certified Values
Element Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Al a % 3.59 0.04 0.12 0.06
As a μg/g 124 5 20 12
Ba a μg/g 100.1 4.5 9.4 4.3
Ca a % 2.30 0.03 0.10 0.05
Ce b μg/g 3960 70 150 70
Co a μg/g 1.58 0.15 0.21 0.13
Cr  no AD b μg/g 277 9 35 19
Cs a μg/g 1.07 0.05 0.14 0.08
Cu μg/g 79.7 2.5 7.6 4.4
Dy a μg/g 847 16 41 19
Er μg/g 701 13 58 26
Eu a μg/g 23.5 0.6 1.7 0.8
Gd a μg/g 433 10 21 10
Hf a μg/g 479 9 26 14
Ho μg/g 208 4 21 9
K a % 3.09 0.04 0.13 0.06
La a μg/g 1661 28 72 32
Na a % 1.445 0.021 0.077 0.034
Nb a μg/g 4050 90 350 150
Nd a μg/g 1456 25 53 25
Ni μg/g 24.7 1.7 3.2 2.0
P a % 0.0261 0.0024 0.0053 0.0033
Pb μg/g 1137 26 99 46
Pr a μg/g 435 8 18 8
Rb a μg/g 1047 24 47 26
Si a % 31.36 0.16 0.38 0.22
Sm a μg/g 381 8 18 8
Sn a μg/g 498 12 52 25
Sr a μg/g 129 3 13 6
Tb a μg/g 106.2 2.0 9.6 4.4
Th a μg/g 719 19 56 26
Tm a μg/g 106.0 2.1 5.8 2.9
U a μg/g 137 3 10 5
Y b μg/g 5480 100 280 130
Yb a μg/g 678 11 50 22
Zr no AD b % 1.91 0.03 0.15 0.07
Either no sets were received using digestion by two acids (hydrochloric and nitric) and/or by three acids (hydrochloric, nitric and hydrofluoric) or the set(s) by either of these methods was/were declared method outlier(s) based on statistical tests.
The data includes sets by digestion using four acids (hydrochloric, nitric, hydrofluoric and perchloric) in a closed vessel, various types of fusions, pressed powder pellet and/or instrumental neutron activation analysis based on statistical tests or the selection of methods by the laboratories.
Table 2 – REE-1 Provisional Values
Element Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Be a μg/g 590 9 61 34
Bi b μg/g 0.652 0.042 0.062 0.047
C c % 0.0786 0.0046 0.0095 0.0074
Fe a % 4.16 0.03 0.15 0.06
Ga a μg/g 64 1 11 6
Li a μg/g 205 5 17 12
Lu a μg/g 92.4 1.4 8.1 3.8
Mg a % 0.895 0.014 0.063 0.027
Mn a % 0.155 0.003 0.021 0.009
Mo μg/g 36.6 0.9 4.4 2.3
Sb a μg/g 3.16 0.16 0.17 0.15
Ta d μg/g 231 6 29 13
Ti a % 0.384 0.007 0.030 0.013
Tl a μg/g 1.85 0.07 0.34 0.25
V a,e μg/g 9.9 1.8 4.0 2.6
Zn a μg/g 1870 40 200 90
Either no sets were received using digestion by two acids (hydrochloric and nitric) and/or by three acids (hydrochloric, nitric and hydrofluoric) or the set(s) by either of these methods was/were declared method outlier(s) based on statistical tests.
Data fulfilled the conditions for certified but the element was reclassified as provisional since a considerable amount of the data has only one significant figure.
All of the data was obtained from a combustion apparatus with detection by infrared spectroscopy.
The data includes sets by digestion using four acids (hydrochloric, nitric, hydrofluoric and perchloric) in a closed vessel, various types of fusions, pressed powder pellet and/or instrumental neutron activation analysis based on statistical tests or the selection of methods by the laboratories.
Data fulfills the conditions for certified but the element was reclassified as provisional since the between-laboratories standard deviation is 40% of the mean.
Table 3 – REE-1 Informational Values (semi-quantitative only)
Analyte Units Mean No. accepted laboratories / values
Cr (AD3+AD4) a μg/g 230 5 / 25
Ge b μg/g 3 5 / 25
In b μg/g 0.2 4 / 20
loss on ignition c % 2 14 / 70
moisture d % 0.6 10 / 50
S % 0.03 6 / 30
Sc e μg/g 8 3 / 15
W b μg/g 10 13 / 65
Data was derived from digestions by three acids (hydrochloric, nitric and hydrofluoric) and four acids (hydrochloric, nitric, hydrofluoric and perchloric).
Either no sets were received using digestion by two acids (hydrochloric and nitric) and/or by three acids (hydrochloric, nitric and hydrofluoric) or the set(s) by either of these methods was/were declared method outlier(s) based on statistical tests.
Data is based on samples of 1 to 5 grams ignited for 0.8 to 8 hours at 900 to 1100°C; data fulfills the conditions for provisional but was reclassified as informational due to a bi-modal distribution.
Data is based on (i) samples of 0.25 to 5 grams dried for 1 to 22 hours at 90 to 105°C, and (ii) combustion infrared spectroscopy; data fulfills the conditions for provisional but the parameter was reclassified as informational due to the between-laboratory standard deviation being 23% of the mean.
Most sets indicated a limit of detection only; three laboratories gave data by four acid digestion followed by inductively coupled plasma - mass spectroscopy.
Source
REE-1 is an ore containing rare earth elements (REEs), zirconium and niobium from the Strange Lake deposit, Quebec, Canada.  The raw material was donated by Quest Rare Minerals Limited.
Description
The mineral species include: quartz (39.5%), K-feldspar (22.9%), amphiboles plus pyroxenes (9.3%), albite (5.7%), chlorite (3.1%), gittinsite (2.2%), zircon (1.8%), fluorite and titanite (each at 1.4%), epidote, gittinsite-Y and talc (each at 1.2%), gadolinite-Y and zircon-Y (each at 1.1%), kainosite-Y and pyrochlore-Y (each at 1.0%), anorthite (0.8%), gerenite-Y, hematite and UN1930-01 (an oxide) (each at 0.6%), bastnaesite-Y (0.5%), other various unspecified minerals (0.4%), calcite and thorite-like (each at 0.3%), apatite and monazite (each at 0.2%), latrapite, pyrochlore and sphalerite (each at 0.1%), pyrite (0.04%), siderite (0.03%) and ankerite (0.02%).
Intended use
REE-1 is suitable for the analysis of rare earth elements, zirconium, niobium and various other elements in ores in concentrations ranging from major to minor to trace levels. Examples of intended use include quality control and method development. 
Instructions for use
REE-1 should be used “as is”, without drying. The contents of the bottle should be thoroughly mixed before taking samples.  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 ground and sieved to remove the plus 75 μm fraction. The recovery of the minus 75 μm fraction was 62%.  The product was blended, and then bottled in 100-gram units. This is the only size that is available.
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. For aluminum, calcium, erbium, holmium, silicon and yttrium, test portions of 0.1 grams were fused with lithium metaborate and the concentration was determined using inductively coupled plasma – optical emission spectroscopy or inductively coupled plasma – mass spectrometry.  For niobium and zirconium, test portions of 0.5 grams were fused with lithium tetraborate and analyzed by X-ray fluorescence.  Use of a smaller subsample than specified above will invalidate the use of the certified values and associated parameters. 
Statistical analyses were used to assess the homogeneity of these elements. No significant between-bottle variation was observed for any of these elements.