DEVELOPMENT OF LA, CE, AND SM ANALYSIS METHOD ON GEOLOGICAL SAMPLES USING INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP-OES)
Rare earth elements (REEs) are critical materials that needed for the development of various advanced and environmentally friendly technologies. Higher demand for REEs results in increased processing of rare earths minerals. Geological REE sample destruction was performed as preparation stage in...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/70516 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Rare earth elements (REEs) are critical materials that needed for the development of various
advanced and environmentally friendly technologies. Higher demand for REEs results in
increased processing of rare earths minerals. Geological REE sample destruction was
performed as preparation stage in order to separate the analytes from their constituent matrix.
The most commonly used method for sample preparation was carried out by dissolving the
sample with oxidizing acid. Furthermore, measurement of analyte levels of REEs was carried
out with Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). The
development of analytical methods needs to include analytical performance parameters to
determine the quality of measurement results. However, the method of preparation of rare
earths samples that is routinely used in Centre of Mineral Coal and Geothermal Resources,
Geological Agency is a non-standardized method. Therefore, this research has developed a
sample preparation method using oxidizing acid for La, Ce, and Sm analysis of geological
samples. Analytical performance parameters were tested using Certified Reference Materials
(CRM). Obtained accuracy values is in the range of 94–108% and precision values in the form
of %RSD is in the range of 1,5–12%. For the linearity of the three elements with chosen
wavelength tested has fulfilled R2 > 0,997. The detection limits and quantification limits for
La, Ce and Sm ranged from 0,25–0,5 ppm and 0,5–1,43 ppm. The developed method was used
on geological sample analysis which also yielded good results. Accuracy values with spiked
samples are obtained in the range of 84–107% and precision values in the form of %RSD range
from 0,4–12%. Based on the analytical performance parameters, it was found that the
elemental analysis method for La, Ce and Sm in this study showed good results so that the
method could be used as a routine analytical methods. |
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