PBS-74
PBS-74 is a certified reference material (CRM) manufactured from bauxite, prepared and certified in accordance with ISO Guide 35:2017 and ISO 17034:2016. This CRM is designed for quality control (QC) of XRF and TGA analysis in bauxite and alumina laboratories, ensuring accuracy and traceability in analytical processes.
Key Features
- Certified concentrations for major, minor, and trace elements, including Al₂O₃, SiO₂, Fe₂O₃, and LOI.
- Produced via multi-stage crushing, pulverisation, and homogenisation to ensure uniformity.
- Certified through an inter-laboratory program involving 10 ISO/IEC 17025-accredited laboratories, with rigorous statistical outlier removal.
- Supplied in 10g heat-sealed aluminised bags or 1kg press-seal plastic jars, with randomised labelling for unbiased sampling.
- Stable under normal storage conditions, with a 10-year validity period.
Key Certified Values
|
Analyte |
Certified Value (y) |
Standard Deviation (s) |
95% Confidence Interval (CI) |
||
|
1 SD |
1 SD Within Lab |
lower |
upper |
||
|
Al2O3 |
42.53 |
0.139 |
0.126 |
42.46 |
42.60 |
|
SiO2 |
18.41 |
0.095 |
0.066 |
18.35 |
18.48 |
|
Fe2O3 |
19.73 |
0.098 |
0.075 |
19.67 |
19.78 |
|
TiO2 |
1.86 |
0.018 |
0.007 |
1.85 |
1.88 |
|
MnO |
0.010 |
0.0018 |
0.0017 |
0.009 |
0.011 |
|
CaO |
0.016 |
0.0055 |
0.0043 |
0.012 |
0.019 |
|
P2O5 |
0.043 |
0.0044 |
0.0024 |
0.040 |
0.047 |
|
SO3 |
0.034 |
0.0105 |
0.0015 |
0.019 |
0.048 |
|
MgO |
0.050 |
0.0082 |
0.0067 |
0.044 |
0.055 |
|
K2O |
0.019 |
0.0033 |
N/A |
0.016 |
0.022 |
|
Na2O |
0.025 |
0.0101 |
0.0069 |
0.018 |
0.033 |
|
LOI1000 |
17.2 |
0.117 |
0.099 |
17.10 |
17.25 |
Intended Use
- QC monitoring for XRF/TGA analysis of bauxite and alumina.
- Validation of laboratory precision and accuracy in sample preparation and analysis.
- Recommended for Shewhart chart development to track lab performance over time.
