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REE-2稀土碳酸鹽巖石成分分析標(biāo)準(zhǔn)物質(zhì)Carbonatite with Rare Earth Elements

Table 1 – REE-2 Certified Values
Analyte Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Al a % 0.761 0.015 0.049 0.020
Ba b % 5.02 0.08 0.29 0.15
Ca a % 13.68 0.16 0.37 0.16
Ce a μg/g 9610 140 360 160
Co a μg/g 7.71 0.31 0.51 0.27
Dy a μg/g 69.2 1.4 1.6 0.8
Er a μg/g 14.0 0.4 1.6 2.1
Eu a μg/g 96.6 1.7 5.8 2.5
Fe a % 12.14 0.17 0.42 0.17
Ho a μg/g 7.87 0.20 0.56 0.25
La (total) b μg/g 5130 80 110 50
Li a μg/g 9.61 0.54 0.59 0.43
Loss on ignition c % 31.38 0.07 0.19 0.11
Mg (total) b % 6.26 0.06 0.21 0.10
Mn (total) b % 1.316 0.015 0.051 0.024
Nd a μg/g 3660 60 170 70
P a % 0.461 0.006 0.024 0.011
Pr a μg/g 1075 22 52 26
Rb a μg/g 1.22 0.17 0.24 0.13
S(total) d % 1.745 0.041 0.092 0.057
Sc a μg/g 57.5 1.1 3.6 2.0
Si (total) b % 1.377 0.020 0.053 0.030
Sm a μg/g 410 6 16 7
Sn a μg/g 24.1 1.0 3.3 1.5
Sr a μg/g 2300 40 210 80
Ta a μg/g 1.17 0.11 0.25 0.15
Tb a μg/g 20.3 0.4 1.4 0.7
Th a μg/g 737 12 34 14
Ti b % 0.1969 0.0048 0.0096 0.0049
Tm a μg/g 1.383 0.042 0.044 0.022
U a μg/g 3.73 0.13 0.27 0.12
W a μg/g 9.9 0.6 1.3 0.9
Y a μg/g 176 3 13 6
a The data generally includes sets by digestion using four acids (hydrochloric, nitric, hydrofluoric and perchloric); various fusions; and for some elements, fused pellet, fusion or pressed powder pellet followed by x-ray fluorescence; and instrumental neutron activation analysis.
b The data generally includes sets by various fusions, and fused pellet or fusion followed by x-ray fluorescence.
c The data is based on samples of 0.8 to 2 grams ignited for 0.5 to 4 hours at 650 to 1050°C.
d The data generally includes sets by combustion followed by infrared spectroscopy and various fusions.
Table 2 – REE-2 Provisional Values
Analyte Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Be a, b μg/g 3.31 0.14 0.14 0.13
Bi c μg/g 2.00 0.10 0.39 0.22
C d % 9.06 0.06 0.26 0.17
Cd μg/g 1.11 0.10 0.24 0.19
Cr (total) e μg/g 32.7 1.3 8.7 7.3
Cu (AD) a, f, g μg/g 5.55 0.44 0.44 0.27
Gd b μg/g 219 4 21 10
Hf b, c μg/g 0.95 0.39 0.39 0.17
In b μg/g 1.403 0.055 0.063 0.056
K b % 0.0172 0.0021 0.0050 0.0040
Lu b μg/g 0.92 0.03 0.16 0.07
Mo μg/g 154 3 13 6
Na b, c % 0.120 0.008 0.025 0.013
Nb b μg/g 1060 30 130 60
Ni (AD) a, f μg/g 8.99 0.28 0.70 0.75
Ni (total) a, e μg/g 13.1 1.6 2.7 2.4
Pb c μg/g 40.8 3.2 9.6 4.3
Sb b, c μg/g 0.89 0.06 0.14 0.09
Tl b μg/g 0.240 0.009 0.036 0.028
V (total) e μg/g 79 2 16 8
Yb b μg/g 7.2 0.2 1.0 0.5
Zn (AD) f μg/g 369 13 47 34
Zn (total) e μg/g 420 11 62 38
Zr (total) e μg/g 32.2 3.2 7.9 4.3
a Statistical analysis of the data warrants classification as provisional despite only 6 or 7 sets of data.
b Tthe data generally includes sets by digestion using four acids (hydrochloric, nitric, hydrofluoric and perchloric), various fusions and; for some elements, fused pellet, fusion or pressed powder pellet followed by x-ray fluorescence.
c Data fulfills the conditions for certified but the element was reclassified as provisional since the between-laboratories standard deviation is 15% or more of the mean; and/or a considerable amount of data consists of one significant figure.
d The data was generally obtained from a combustion infrared apparatus.
e The data generally includes sets by various fusions; and for some elements, fused pellet, fusion or pressed powder pellet followed by x-ray fluorescence.
f The data includes digestion using two acids (nitric and hydrochloric) and four acids.
g The data for copper using acid digestions appears to yield a lower value than that by fusion. However, due to lack of agreement, it was not possible to assign a total value.
However, due to lack of agreement, it was not possible to assign a total value.
Table 3 – REE-2 Indicative Values (semi-quantitative only)
Analyte Units Mean No. accepted laboratories / values
Ag μg/g 1 5 / 25
Cr (AD4) a μg/g 14 5 / 25
Cs b μg/g 0.09 7 / 35
Ga a μg/g 60 3 / 15
Ge b μg/g 7 5 / 35
La (AD4) a μg/g 4600 4 / 20
Mg (AD4) a % 5.7 5 / 25
Mn (AD4) a % 1.1 5 / 25
Moisture c % 0.4 13 / 65
S (AD4) a % 0.7 3 / 15
V (AD4) a μg/g 60 4 / 20
Zr (AD4) a μg/g 20 4 / 20
a The data includes sets by digestion using four acids (hydrochloric, nitric, hydrofluoric and perchloric) only.
b The data includes sets by digestion using four acids and various fusions.
c The data was obtained from samples of 0.8 to 2 grams dried for 0.5 to 4 hours at 105°C.
Source
REE-2 is a carbonatite with rare earth elements obtained from a Canadian mining company.
Description
The mineral species include: dolomite (35.4%); ankerite (22.6%); siderite (13.0%); barite (8.6%); chlorite (5.0%); apatite-REE and calcite (each at 3.1%); hornblende (1.7%); pyrite (1.3%); fergusonite (1.1%); allanite (0.9%); galgenbergite and monazite (each at 0.6%); apatite and magnetite (each at 0.4%); rutile-Nb (0.3%); hastingsite, parisite, quartz and Y-Ti-niobate (each at 0.2%); bastnaesite , biotite, Ca-Fe-REE, Ca-Ti-Ce-Nd-silicate, chevkinite, hematite, sphalerite, titanite-REE and Y-Ca-silicate (each at 0.1%); annite and Ca-betafite (each at 0.03%); molybdenite and titanite (each at 0.02%); ilmenite, orthoclase and thorite (each at 0.01%).
Intended use
REE-2 is suitable for the analysis of rare earth elements and other elements in ores at concentrations ranging from major, minor to trace levels. Examples of intended use include quality control and method development.
Instructions for use
REE-2 should be used “as is”, without drying. The contents of the bottle should be thoroughly mixed before taking samples. 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
After crushing, milling and sieving, the recovery of the minus 75 μm fraction was 70%. 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. Subsamples of 0.05 grams were digested using hydrochloric, nitric and hydrofluoric acids in a microwave oven, and analyzed by inductively coupled plasma – atomic emission spectroscopy for calcium and cerium; and by inductively coupled plasma – mass spectrometry for erbium, samarium and thorium.