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IOC-1鐵礦石成分分析標準物質(zhì)Iron Ore

Table 1 – IOC-1 Certified Values
note:  Results are based on samples that were dried for one hour at 105°C.  The values were generally derived from various fusions and acid digestion methods followed by inductively coupled plasma - optical emission spectroscopy or X-ray fluorescence. Footnotes give details of specific cases. For more detailed information, please refer to the certification report.
Analyte Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
CaO (non AD) a, b % 0.975 0.007 0.015 0.006
Cr2O3 % 0.0224 0.0016 0.0027 0.0013
Fe (T) classical c % 65.66 0.06 0.24 0.16
Fe (T) instr d % 65.62 0.16 0.25 0.13
FeO c % 20.76 0.13 0.29 0.17
Loss on ignition e % 0.863 0.024 0.041 0.020
MgO (non AD) a % 1.043 0.010 0.026 0.011
MnO % 0.472 0.004 0.012 0.005
P % 0.0120 0.0006 0.0018 0.0008
SiO2 % 2.633 0.041 0.048 0.020
TiO2 % 0.0429 0.0018 0.0052 0.0024
a data using various acid digestions was excluded based on statistical tests
b there is some evidence that, under certain conditions, inductively coupled plasma – optical emission spectroscopy gives less precise results
c data was derived from various titrimetric methods
d data was generally derived from various fusions followed by X-ray fluorescence or inductively coupled  plasma - optical emission spectroscopy
e samples of 1 to 5 grams were ignited for 1 to 3 hours at 1000 to 1050°C or by thermogravimetry
 

Table 2 – IOC-1 Provisional values
Analyte Units Mean Within-lab Standard Deviation Between-labs Standard Deviation 95% Confidence Interval of Mean
Al2O3a % 0.184 0.009 0.036 0.015
Co b μg/g 19.99 0.51 0.63 0.71
Mo b μg/g 22.89 0.77 0.98 0.96
S c % 0.00657 0.00059 0.00069 0.00045
Sr b μg/g 4.38 0.25 0.30 0.34
V μg/g 40.8 2.0 8.7 6.3
a data fulfilled the conditions for certified but the element was reclassified as provisional since the between-laboratories standard deviation is approximately 20% of the mean
b statistical analysis of the data warrants classification as provisional despite only 6 sets of data
c data was derived from both combustion - infrared spectrometry and fusion X-ray fluorescence; 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
 

Table 3 – IOC-1 Indicative Values (semi-quantitative only)
Analyte Units Mean No. accepted laboratories / values Analyte Units Mean No. accepted laboratories / values
Ba μg/g 30 7 / 35 La μg/g 8 3 / 15
C % 0.9 4 / 20 MgO (AD) a % 0.9 4 / 18
CaO (AD) a % 0.9 3 / 15 Nb μg/g 3 4 / 20
Ce μg/g 14 3 / 15 Ni μg/g 9 8 / 40
Cl b % 0.003 4 / 20 Pb μg/g 2 3 / 15
CO2 % 3 4 / 20 Th μg/g 0.8 4 / 20
Cu μg/g 8 6 / 30 W μg/g 3 3 / 15
Magnetite c % 58 6 / 30 Y μg/g 3 4 / 20
Ga μg/g 2 3 / 15 Zn μg/g 11 7 / 35
K2O % 0.004 8 / 38 Zr μg/g 6 5 / 25
a digestion using various combinations of acids
b data was generally derived from fusion followed by X-ray fluorescence
c data was derived using saturation magnetization analyzer
SOURCE
IOC-1 is an iron ore donated by the Iron Ore Company of Canada, Labrador City, Newfoundland and Labrador, Canada.
DESCRIPTION
The mineral species include: magnetite  (58.7%); hematite (31%); siderite (3.1%); dolomite (2.6%); quartz (2.4%); goethite (0.7%); magnesite (0.6%); limonite (0.4%); bixbyite (0.2%); apatite, clays and rhodochrosite (all at 0.1%); garnet and other (both at 0.04%); olivine (0.03%); ankerite, calcite, chamosite, clinochlore and ilmenite (all at 0.02%); albite, biotite, bronzite, eulite, ferrohornblende, hornblende, muscovite and pyrolusite (all at 0.01%).